Q. 35.0( 2 Votes )

The radius of a hemisphere is 4.5 cm. Find its surface area and its volume.

Answer :

Hemisphere is half of a sphere


So the volume and area will be halved


But for total surface area there would be one more area which is the flat circle of a hemisphere


Radius of hemisphere = r = 4.5 cm =


Surface area of hemisphere = 3πr2


= 3 × ×


= 3 × ×


=


=


= 190.92 cm2


Volume of hemisphere = πr3


= × ×


=


=


= 190.92 cm3


Therefore, surface area is 190.92 cm2 and volume is 190.92 cm3


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