Question

The radius of sphere is 1.41. Its volume to an appropriate number of significant figure is

• A. 11.73 cm³
• B. 11.736 cm³
• C. 11.7 cm³
• D. 117 cm³

Answer 1

Answer: (C)

11.7 cm³

Answer 2

Radius of the sphere, $\mathrm { r } = 1.41 \mathrm {~cm}$

(3 significant figures Volumes of the sphere, $\mathrm { V } = \frac { 4 } { 3 } \pi \mathrm { r } ^ { 3 }$ $= \frac { 4 } { 3 } \times 3.14 \times ( 1.41 ) ^ { 3 } \mathrm {~cm} ^ { 3 }$

$= 11.763 \mathrm {~cm} ^ { 3 }$

Rounded off upto 3 significant figures $= 11.7 \mathrm {~cm} ^ { 3 }$