1096 . a pull 6m high casts a shadow 2/3 m long on the ground ,then sun's elivation is -

A. 83.66 deg
B. 45 deg
C. 30 deg
D. 90 deg

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Answer: Option A

Explanation:

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Sonali Bank Ltd. Senior Officer Recruitment 01.06.2018

A. 13/3 hrs
B. 7 hrs
C. 8 hrs
D. 14 hrs

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Answer: Option D

Explanation:

Work done by the leak in 1 hour
= 1/2−3/7 = 1/14
∴ The leak will empty the tank in 14 hours

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অফিসার (ক্যাশ ) - Sonali | Rupali | BD Krishi | Rajshahi Krishi Unnayn | Investment Corporation Of Bangladesh - ২৯. ০৩.২০১৯

A. 4 hours
B. 5 hours
C. 3 hours
D. 6 hours

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Answer: Option B

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Bangladesh Bank - Assistant Director - 2010

A. 1080
B. 1125
C. 1050
D. 925

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Answer: Option B

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1100 . A rectangle area of 16 meters by 12 meters. is surrounded by a road of 3 meters wide. The area of the road is:

A. 78
B. 132
C. 204
D. 216

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Answer: Option C

Explanation:

best des
Area of the rectangle without the road = 16×12 = 192 sq. m.

Length with road on both side = 16 + 2×3 = 22 m.

Width with road on both side = 12 + 2×3 = 18 m.

Area of the rectangle including the road = 22×18 = 396 sq. m.

Area of the road = 396 - 192 = 204 sq. m.

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1101 . A rectangle is 14 cm long and 10 cm wide. If the length is reduced by x cms and its width is increased also x cms so as to make it a square, then its area changes by:

A. 4
B. 144
C. 12
D. 2

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Answer: Option A

Explanation:

Let's call the new length of the rectangle "L" after reducing the length by x cm and increasing the width by x cm. Then, the new width of the rectangle would be "W".

We know that the original length of the rectangle was 14 cm and the original width was 10 cm, so we can write the following equations:

L = 14 - x
W = 10 + x

To make the rectangle into a square, the length and the width must be equal, so we can set L = W:

14 - x = 10 + x
24 = 20
x = 2

Now that we know x = 2, we can use that to find the new length and width of the rectangle:

L = 14 - 2 = 12
W = 10 + 2 = 12

The area of the original rectangle was 14 cm * 10 cm = 140 sq cm. The area of the new square is 12 cm * 12 cm = 144 sq cm. The difference between the two is 144 - 140 = 4 sq cm.

So, the area changes by 4 sq cm when the rectangle is transformed into a square.

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1102 . A rectangle is 14 cm long and 10 cm wide . If the length is reduced by x cms and its width is increased also by x cms so as to make it a square, then its area changes by :

A. 4
B. 144
C. 12
D. 2
E. None of these

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Answer: Option A

Explanation:

Area = 14 × 10 = 140 sq.cm

New length = ( 14 - x)

New width = ( 10 + x)

14 - x = 10 + x

2x = 4

x = 2

New Area = ( 14 - 2) × ( 10 + 2) = 144

change is area = ( 144 - 140) sq.cm = 4 sq.cm

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Bangladesh Bank - Assistant Director - 2009

1103 . A rectangle is twice as long as it is wide. If the width is a, what is the length of its diagonal ?

A. $a \sqrt{2}$
B. $a \sqrt{3}$
C. $a \sqrt{5}$
D. $3 a$

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Answer: Option C

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Bangladesh Bank - Assistant Director - 2004

A. 300 square feet
B. 180 square feet
C. 108 square feet
D. 64.8 square feet

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Answer: Option B

Explanation:

Area of the carpet = 9 x 12 = 108 sq ft

60% of the floor = 108 sq ft

So, total or 100% floor area = 108 x 100 / 60 = 180 sq ft

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1105 . A rectangular field will be fenced on three sides leaving a side of 20 feet uncovered. If the area on the filed is 680 squares feet, how many feet of fencing will be required?

A. 88
B. 34
C. 40
D. 68

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Answer: Option A

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উত্তরা ব্যাংক | অ্যাসিস্ট্যান্ট অফিসার | 23-07-2022

A. 18π
B. 18/π
C. π/18
D. 9/2π

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Answer: Option B

Explanation:

ধরি, Cylindrical container এর উচ্চতা h মিটার

এবং, ব্যাসার্ধ r = 10/2 মিটার = 5 মিটার

π(5)2 × h = 25 × 9 × 2

h = 25 × 9 × 2 /25π

h = 18/π

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Three Combined Bank Recruitment - Senior Officer 03 .08.2018 ||

A. Tk. 160
B. Tk. 240
C. Tk. 480
D. None of these

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Answer: Option A

Explanation:

Number of carpets required to cover the entire floor = total floor area/ area of carpet = 10x8 /2x2 = 20
Total cost of carpet squares = 20 x 12x(2/3) = Tk. 160

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সমন্বিত ৯ ব্যাংক | 07-01-2022 ||

A. 60
B. 72
C. 80
D. 90
E. None of these

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Answer: Option A

Explanation:

Let's denote the length of the two shorter sides of the rectangular plot as "x" feet each, and the length of the longer sides as "3x" feet each.

The area of a rectangle is given by the formula: Area = Length x Width.

Given that the area of the plot is 432 square feet, we can write the equation:

Area = x * 3x = 3x^2.

Now, we have the equation:

3x^2 = 432.

To find the value of "x," divide both sides of the equation by 3:

x^2 = 432 / 3 x^2 = 144.

Now, take the square root of both sides to solve for "x":

x = √144 x = 12.

So, the length of the shorter sides is 12 feet, and the length of the longer sides is 3x = 3 * 12 = 36 feet.

Now, let's calculate the total length of the fence:

Two shorter sides: 2 * x = 2 * 12 = 24 feet. One longer side: 36 feet.

Total length of the fence = 24 feet + 36 feet = 60 feet.

So, the total length of the fence is 60 feet.

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বাংলাদেশ গ্যাস ফিল্ড | সহকারী-ব্যবস্থাপক | 03-12-2021 || 2021

A. $40
B. $500
C. $100
D. $480

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Answer: Option B

Explanation:

area of rectangular room = 8*5 = 40 square meter

So, the carpet cost = 40×$12.50 = $500 (Ans)

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First Security Islami Bank Ltd | Probationary Officer | 19-02-2021

A. 9
B. 12
C. 16
D. 21

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Answer: Option B

Explanation:

Volume of the rectangular tank = 10×8×4 = 320 in3

Volume of a smaller tank = 33 = 27 in3

Number of smaller tanks needed = 320/27 ≈ 12

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Jamuna Bank Ltd - Probationary Officer - 2009

1096 . a pull 6m high casts a shadow 2/3 m long on the ground ,then sun's elivation is -

1097 . A pump can fill a tank with water in 2 hours. Because of a leak, it took 7/3 hours to fill the tank. The leak can drain all water of the tank in:

1098 . A pump remover's water at a rate of 6 gallons per minute. How many hours will it take to remove 1800 gallons?

1099 . A radio dealer sold a radio at a loss of 2.5%. Had he sold it for Tk.100 more, he would have gained 15/2%. In order to gain 25/2%, he would sell it for---

1100 . A rectangle area of 16 meters by 12 meters. is surrounded by a road of 3 meters wide. The area of the road is:

1101 . A rectangle is 14 cm long and 10 cm wide. If the length is reduced by x cms and its width is increased also x cms so as to make it a square, then its area changes by:

1102 . A rectangle is 14 cm long and 10 cm wide . If the length is reduced by x cms and its width is increased also by x cms so as to make it a square, then its area changes by :

1104 . A rectangular carpet, that is 9 feet by 12 feet, covers 60% of a rectangular floor. What is the area of the floor?

1105 . A rectangular field will be fenced on three sides leaving a side of 20 feet uncovered. If the area on the filed is 680 squares feet, how many feet of fencing will be required?

1106 . A rectangular fish tank 25m by 9m has water in it to a level of 2m . This water is carefully poured into a cylindrical container with a diameter of 10m . How high will the water reach in the cylindrical container?

1107 . A rectangular floor that measures 8 metres by 10 metres is to be covered with carpet squares that each measures 2 metres by 2 metres. If a carpet square costs Tk. 12, calculator the total cost cover 2/3 of the floor?

1108 . A rectangular plot of land has a fence along three of its four sides. The undenced side and the side opposite the unfenced side have a length that is three times thel length of the other two sides. If the area of the plot is 432 square feet, what is the total length id the fence in feet.

1109 . A rectangular room that is 8 meters by 5 meters is to be carpeted using carpet costing $12.50 per spare meter

1110 . A rectangular tank 10 inch by 8 inch by 4 inch is filled with water. If all of the water is to be transferred to cube-shaped tanks, each one 3 inches on a side, how many of these smaller tanks are needed?

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