Question

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if radius of balloon increases from 14 cm to 35 cm as air is being pumped into it.find ratio of their surface area​

Answer 1

Answer:

Then the radius of small balloon =

14/2

=7cm

And radius of bigger balloon=

35/2=17.5

Surface area of balloon =4πr 2

ratio of the surface area of two balloons =

4phi(7)2/ 4phi (17.5)/2

then calculate them