Question

the radius of a sphere is doubled . Find the increase per cent in surface area

Answer 1

surface area increases by 300%

Answer 2

how

Answer 3

@Ahmad_Shadab
your answer was correct, but plse tell me how it comes

Answer 4

@ritez

Answer 5

A1 = 4 pi r^2
when radius is 2r
A2 = 4A1

so % increase is (A2 - A1)/ A1 x 100

i hope u understand now

Answer 6

yes
thank u @ritez

Answer 7

yw :)