The Total solution for NCERT class 6-12
Find the volume of a sphere whose surface area is 154 cm2.(Assume π = 22/7)
Let r be the radius ofa sphere.
Surface area of sphere= 4πr2
4πr2 =154 cm2 (given)
r2 =(154×7)/(4 ×22)
r = 7/2
Radius is 7/2 cm
Now,
Volume of the sphere =(4/3) πr3