Question

. The radius of a spherical balloon is inflated from 1.5 cm to 2.5 cm by pumping more air in it. Find the ratio of surface Area of resulting balloon to the original balloon

Answer 1

Solution:-

Surface area of sphere = 4πr²
Surface area of the balloon radius 1.5 cm = 4π*1.5*1.5
Surface area of the balloon radius 2.5 cm = 4π*2.5*2.5
Ratio of surface area of resulting balloon to original balloon
= (4π*2.5*2.5)/(4π*1.5*1.5)
= (2.5*2.5)/(1.5*1.5)
= 6.25/2.25
= 25/9
Ratio = 25 : 9
Answer.

Answer 2

Answer:

25:9 could become your answer