The radius of a sphere is 7 cm if the radius be increased by 5 0% find how much percent is volume is increased
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Answer:
Step-by-step explanation:
Let the original radius be r.
So, the surface area of the sphere =4πr2 .......(1)
Since, the radius is increased by 50%, then
The new radius =1.5r
Therefore, the new surface area of the sphere will be
=4π(1.5r) 2
=2.25×4πr2 .........(2)
Therefore, the required percentage
=2.25×4πr 2 −4πr2 / 4πr2 ×100
= 1.25×4πr2 h ×100 /4πr2 h
=125%
Hence, this is the answer.
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