What is the volume in cubic cm of a pyramid whose area of the base is 25 sq cm and height 9 cm ?

Answer: Option B

Volume of pyramid :
$$\begin{array}{rl}& =\frac{1}{3}\times \text{Area of base}\times \text{Height}\\ & =\left(\frac{1}{3}\times 25\times 9\right)\text{c}{\text{m}}^3\\ & =75\text{c}{\text{m}}^3\end{array}$$