Q. 64.0( 21 Votes )

sq cm. of sheet is required to make a hemispherical bowl. Let us write by calculating the length of diameter of the forepart of the bowl.

Answer :

Given:


Surface area of hemisphere = 127(2/7) cm2


Formula used:


1. Surface area of hemisphere = 2×π×r2



2×π×r2 = 127(2/7)


r2 = 20.25


r = 4.5cm


2. Diameter of sphere = 2×Radius


Diameter = 9cm


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sq cm. of sheet is required to make a hemispherical bowl. Let us write by calculating the length of diameter of the forepart of the bowl.

West Bengal Board - Mathematics