Question

The volume of a cylinder is 3080 $c{m}^3$ and radius is 7 cm, height is---

• A. 15 cm
• B. 20 cm
• C. 10 cm
• D. None of these

Answer 1

Answer: (B)

20 cm

Given:

Volume $=3080c{m}^3$

Radius $=7cm$

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

$3080=\frac{22}{7}\times (7{)}^2\times h$

$\Rightarrow 3080=22\times 7\times h$

$\Rightarrow 3080=154\times h$

$\Rightarrow 154\times h=3080$

$\Rightarrow h=\frac{3080}{154}$

$\therefore h=20cm$