241 views

For a sphere of radius $10$ cm, the numerical value of the surface area is how many percent of the numerical value of its volume?

1. $26.5\%$
2. $24\%$
3. $30\%$
4. $45\%$

ans :-- option C

surface area :-- 4 * pie * R^2

volume :-- 4 * pie * R^3 / 3

percentage = 4 * pie * 10 * 10 *100 / (4/3) * pie * 10 * 10 * 10

= 30 %
by
182 points

1 vote
1
337 views