Question

The radius of a sphere is $1.41cm$. Its volume to an appropriate number of significant figures is

• A. $11.73c{m}^3$
• B. $11.736c{m}^3$
• C. $11.7c{m}^3$
• D. $117c{m}^3$

Answer 1

Answer: (C)

Radius of the sphere, $r=1.41cm$
($3$ significant figures)
Volume of the sphere,
$V=\frac{4}{3}\pi r^3=\frac{4}{3}\times 3.14\times {\left(1.41\right)}^{3}c{m}^3$
$=11.736c{m}^3$
Rounded off upto $3$ significant figures $=11.7c{m}^3$.