Question

2. If the radius of a sphere is increased by 2 cm,
then its surface area increases by 352 cm.
Find the radius of the sphere before the
increase. answer is 6cm. ​

Answer 1

Step-by-step explanation:

ATQ ,4*22/7*(x+2)^2-4*22/7*(2)^2=352

4*22/7[(x+2)^2-(x)^2]=352

x^2+4+4x-x^2=28

x+1=7

x=6cm