Question

if the radius of hemispherical balloon increase from 5cm to 10cm as air is pumped into it find the area of the new balloon to the original​

Answer 1

Answer:

Total surface area of a Hemisphere =2πr

2

+πr

2

=3πr

2

r=6,Surface area=3π(6)

2

=36

r=12,Surface area=3π(12)

2

=144

Ratio = 36:144

=1:4

Answer 2

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