Question

he radius of a sphere is 14cm .To paint the surface of the sphere at 2 paise per 1 sq cm ,how much will it cost?​

Answer 1

ANSWER

Given the diameter of the small balloon is 14cm and diameter bigger balloon is 28cm

Then the radius of small balloon =

2

14

=7cm

And radius of bigger balloon=

2

28

=14cm

We know the Surface area of balloon =4πr

2

Then the ratio of the surface area of two balloons =

4π(14)

2

4π(7)

2

=

196

49

=

4

1

Then the ratio of both balloon =1:4

Answered By

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