• A. ${\mathrm{\pi cm}}^3$
• B. $\frac{4}{3}{\mathrm{\pi cm}}^2$
• C. $2{\mathrm{\pi cm}}^3$
• D. $4{\mathrm{\pi cm}}^3$

Answer: Option B

Explanation:

• A. $\frac{\theta }{360}{\mathrm{\pi r}}^2$
• B. $\frac{\theta }{90}{\mathrm{\pi r}}^2$
• C. $\frac{\theta }{210}{\mathrm{\pi r}}^2$
• D. $\frac{\theta }{180}{\mathrm{\pi r}}^2$

Answer: Option A

Explanation:

• A. $2\sqrt{5}$
• B. $\sqrt{10}$
• C. $5\sqrt{2}$
• D. $3\sqrt{5}$

Answer: Option C

Explanation:

• A. $x\sqrt{2}$
• B. $x\sqrt{3}$
• C. $2\sqrt{2x}$
• D. $\sqrt{x}$

Answer: Option A

Explanation:

• A. $\mathrm{\pi }-4$
• B. $4-{\mathrm{\pi }}^2$
• C. $4-\mathrm{\pi }$
• D. $2-\mathrm{\pi }$

Answer: Option C

Explanation:

• A. $\frac{\sqrt{৩}}{৪}{ক}^{২}$
• B. $\frac{\sqrt{৩}}{২}{ক}^{৩}$
• C. $\frac{\sqrt{৩}}{৫}{ক}^{৩}$
• D. $\frac{\sqrt{৩}}{২}{ক}^{৫}$

Answer: Option A

Explanation:

• A. $\frac{1}{2}\left(a+b\right)h$
• B. $\frac{\sqrt{3}}{4}{a}^2$
• C. $6a^2$
• D. ${\mathrm{\pi r}}^2\mathrm{h}$

Answer: Option A

Explanation:

• A. $\left(a+b\right)h$
• B. $2\left(a+b\right)h$
• C. $\frac{1}{2}\times \left(a+b\right)\times h$
• D. $\frac{1}{2}\left(a-b\right)h$

Answer: Option C

Explanation:

• A. $C=p{\left(1+n\right)}^r$
• B. $C=P\left(1+r^n\right)$
• C. $P=C{\left(1+r\right)}^n$
• D. $C=p{\left(1+r\right)}^n$

Answer: Option D

Explanation:

• A. $\mathrm{\pi }$
• B. $\mathrm{\pi r}$
• C. $2$
• D. $2\mathrm{r}$

Answer: Option A

Explanation:

• A. $n^2$
• B. $\frac{n\left(n+1\right)}{2}$
• C. ${\left\{\frac{n\left(n+1\right)}{2}\right\}}^2$
• D. $\frac{n\left(n+1\right)\left(2n+1\right)}{6}$

Answer: Option D

Explanation:

• A. $\sqrt{3}$
• B. $4\sqrt{3}$
• C. $8\sqrt{3}$
• D. $16\sqrt{3}$

Answer: Option C

Explanation:

• A. $\sqrt{3}$
• B. $2\sqrt{3}$
• C. $3\sqrt{3}$
• D. $4\sqrt{3}$

Answer: Option D

Explanation:

• A. $5\sqrt{3}$ সে.মি
• B. $3\sqrt{5}$ সে.মি
• C. $5\sqrt{5}$ সে.মি
• D. $5\sqrt{2}$ সে.মি

Answer: Option A

Explanation:

• A. $\sin \theta =1+{\cos }^2\theta$
• B. ${\sin }^2\theta =1-{\cos }^2\theta$
• C. ${\sin }^2\theta -{\cos }^2\theta =1$
• D. $\sin \theta =\frac{1}{\cos \theta }$

Answer: Option B

Explanation: