Question

The circumference of base of cylindrical reservoir is $30\pi cm$ and height is $10$ cm. How many litres of water can it hold?

• A. $2.1\pi$ litres
• B. $2.25\pi$ litres
• C. $225\pi$ litres
• D. $2250\pi$ litres

Answer 1

The correct option is B $2.25\pi$ litres

Circumference $2\pi r=30\pi ,r=\frac{30\pi }{2\pi }=15$

Volume of cylinder $=\pi r^{2}h$

$=(\pi \times 10\times 15\times 15){cm}^3$

$=2250\pi {cm}^3$

$=2.25\pi l$