Q. 14.0( 5 Votes )

The surface area

Answer :

Let r cm be the radius of the total sphere.

Then it's surface area would be 4πr2 cm2


This surface area is given as 120 cm2.


we can equate the two:


= 120


= 30


…..(1)


Curved surface area of a hemisphere


Base area =


So total surface area of a hemisphere = 2 + = 3


Substitute value from (1)


So total surface area of each hemisphere


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