Math, asked by Srijan56, 1 year ago

The radius of a spherical balloon increase s from 7 cm to 14 cm as air is pumped into it . find the ratio of surface areas of ballon in two case

Answers

Answered by Anonymous
4

Answer:

1:4

Step-by-step explanation:

R = radius of balloon = 7cm

r = radius of pumped balloon = 14cm

surface area of sphere before inflated / surface area of spherical balloon after inflated

=4×(22/7)×R×R / 4 × (22/7) × r×r

= R×R/r×r

=7×7/14×14

= 49 / 196

= 1:4

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Anonymous: mark it
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