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1. Ten years ago, A was half of B in age. If the ratio of their present age is 3 : 4, what will be the total of their present ages?
- A. 20 years
- B. 20 years
- C. 20 years
- D. 20 years
Answer: Option D
Explanation:
Hints: ধরি বর্তমানে তাদের বয়স 3x ও 4x
প্রশ্নমতে, (3x - 10) = 1/2 (4x - 10)
6x - 20 = 4x - 10
2x = 10
x = 5
Total age = 3x + 4x = 7x = 7 × 5 = 35
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