Question

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

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

Answer 1

The correct option is C 11.7 $c{m}^3$

Radius of the sphere, $r=1.41cm$ ($3$ significant figures)

Volume of the sphere,

$V=\frac{4}{3}\pi r^3=\frac{4}{3}\times 3.14\times (1.41{)}^{3}c{m}^3=11.736c{m}^3$

Rounded off upto $3$ significant figures $=11.7c{m}^3$.