Question

If a regular square pyramid has a base of side $8cm$ and height of $30cm$, then its volume is

• A. $120c{m}^3.$
• B. $240c{m}^3.$
• C. $640c{m}^3.$
• D. $900c{m}^3.$

Answer 1

Answer: (C)

$640c{m}^3.$

Given that:

Side $a=8cm$, Height $h=30cm$

As we know that

Volume of regular square pyramid

$\Rightarrow a^2\frac{h}{3}$

$\Rightarrow 8^2\frac{30}{3}$

$\Rightarrow 64\times 10$

$\Rightarrow 640c{m}^3$

This is the required solution.