Question

The radius of a sphere is 5cm if the diameter is increased by20percent what will be the new radius

Answer 1

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Radius is 5 cm

Diameter = 2× Radius

= 2×5

=10 cm

Now Diameter is increased by 20%

New D = 10+ 20×$\frac{10}{100}$

=10+2

=12 cm

Now New Radius = New $\frac{D}{2}$

= $\frac{12}{2}$

= 6 cm

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