Mensuration Practice Test 6

Question : 3 of 40

Marks: +1, -0

Find the surface area of a hemisphere inscribed in a cuboid with dimensions 4.2 × 4.2 × 2.1 cm.

Solution:

Radius of the hemisphere = 2.1 cm
Surface area the hemisphere =

2πr^2

3 × {22]/7 × (2.1)^2

2×{22}/7 × {21}/{10} × {21}/{10}

≈ 28

cm^2

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