Question

Find the tsa of hemispheric of radius 21cm

Answer 1

Step-by-step explanation:

Given;

r= 21

and, we know that ;

TSA of a hemisphere= 3πr²

= 3 × 22/7× 21²

= 3×22/7×21×21

= 3×22×3×21= 4158(ans). .

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