Question

A reservoir is in the shape of a frustum of a right circular cone. It is 8 m across at the top and 4 m across at the bottom. It is 6 m deep, its capacity is:

• A. $224m^3$
• B. $176m^3$
• C. $225m^3$
• D. None of these

Answer 1

The correct option is B $176m^3$

Volume $=\frac{\pi }{3}h(r^2+Rr+R^2)$
Where $\pi =\frac{22}{7},$ h = 6, R = 4 and r = 2