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Rasheed got a playing top (lattu) as his...

Rasheed got a playing top (lattu) as his birthday present, which surprisingly had no colour on it. He wanted to colour it with his crayons. The top is shaped like a cone surmounted by a hemisphere (see figure). The entire top is 5 cm in height and the diameter of the to is 3.5 cm. What will be the radius of hemispherical portion having diameter 3.5cm ?

A

`1.75 cm`

B

`1.25 cm`

C

`1.5 cm`

D

`1.15 cm`

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Rasheed got a playing top (lattu) as his birthday present,which surprisingly had no colour on it.He wanted to colour it with his crayons.The top is shaped like a cone surmounted by a hemisphere.The entire top is 5cm in height and the diameter of the top is 3.5cm. Find the area he has to colour.

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