Question

calculate the radius of a sphere having surface area 144 pi square cm. find the surface area of the sphere having half the radius of the first sphere

Answer 1

Answer

Step-by-step explanation:

4πr²=144πcm²

Now π will be canceled on both sides so r²=36 and hence r=6cm

Surface area of another sphere having half the radius=3cm

Hence surface area will be

4π*3*3=36πcm²