Question

for.a.sphere.if.radius.is.7cm.then.find.its . surface area​

Answer 1

In formula π is a constant and its value is 227 or 3.14. Hence the surface area of the given sphere is 616cm2. Note: Whenever in our calculation if we have any multiple of 7 in the numerator then we always put π=227to make calculation easy and accurate.

Answer 2

Step-by-step explanation:

In given question

R=7cm

Surface area of sphere is ⇒S =4πR2 ⇒S=4×227×(7)2

⇒S=88×7

⇒S=616cm2

Hence the surface area of the given sphere is 616 cm2