Question

If a tank is in the shape of a right circular cylinder whose radius and height are 7 cm and 14 cm respectively, then the capacity of cylinder is ___

• A. 21.56
• B. 23.56 $\times {10}^{-4}{m}^3$.
• C. 215.6 $\times {10}^{-5}{m}^3$.
• D. 235.6 $\times {10}^{-5}{m}^3$.

Answer 1

Answer: (A), (C)

The correct options are
A

21.56

C

215.6 $\times {10}^{-5}{m}^3$.

Volume of the right circular cylinder $=\pi r^{2}h=\frac{22}{7}\times 7\times 7\times 14$

$=\frac{22}{7}\times \frac{7}{100}$ $\times$ $\frac{7}{100}$ $\times$ $\frac{14}{100}$
$=2.1560\times {10}^{-3}{m}^3$
$=21.56\times {10}^{-4}{m}^3$ ^.