Question

Q13. If the volume of a sphere is numerically equal to its surface area, then find the diameter of the
sphere.
​

Answer 1

Answer:

Volume of sphere=

3

4

πr

3

Surface area of sphere=4πr

2

According to the question

⇒

3

4

πr

3

=4πr

2

⇒

3

r

=1

⇒r=3.

Answer 2

answer is 6 units

volume of sphere = that of sphere