Mensuration Practice Test 10

Question : 9 of 40

Marks: +1, -0

Find the volume of a 0.5 m thick hollow spherical ball whose external diameter is 7 m.

Solution:

Volume of the sphere =

4/3 π(R^3-r^3)

4/3 π[(3.5)^3-(3)^3]

4/3 π[42.875-27]

4/3 × {22}/7 × 15.875

= 66.52

m^2

≈ 67

m^2

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