The radius of hemispherical ballon increase from 7 cm to 14 cm as air is being pumped into it .
Find the ratios of the surface areas of the ballon in the two case.
The radius of hemispherical ballon increase from 7 cm to 14 cm as air is being pumped into it .
Find the ratios of the surface areas of the ballon in the two case.
Answers (1)
Solution: Let S1 and S2 be the surface Area of the hemispherical ballon when its