Question

The radius of a sphere is 10cm if the radius is increased by 1cm. When prove that volume if the sphere is increased by 33.1%

Answer 1

vol. of sphere =4/3 πr^3 
r=10 cm 
vol,v1= (4/3π)1000 
when r is inc. by 1cm new radius =11 
vol,v2=(4/3π)13331
now percent change =(v2-v1)/v1
=(331/1000) *100
=33.1%

hence proved

Answer 2

this is the answer of this question