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Mathematics

The circumference of the edge of a hemispherical bowl is 132 cm. Find the capacity of the bowl.

Mensuration

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Answer

Circumference of the edge of bowl = 132 cm.

2πr=1322×227×r=132r=132×722×2r=3×7r=21 cm.\therefore 2πr = 132 \\[1em] \Rightarrow 2 \times \dfrac{22}{7} \times r = 132 \\[1em] r = \dfrac{132 \times 7}{22 \times 2} \\[1em] r = 3 \times 7 \\[1em] r = 21 \text{ cm}.

Volume of hemispherical bowl (V) = 23πr3\dfrac{2}{3}πr^3

Putting values we get,

V=23×227×(21)3=2×22×21321=2×22×441=19404 cm3.V = \dfrac{2}{3} \times \dfrac{22}{7} \times (21)^3 \\[1em] = \dfrac{2 \times 22 \times 21^3}{21} \\[1em] = 2 \times 22 \times 441 \\[1em] = 19404 \text{ cm}^3.

Hence, the capacity of bowl = 19404 cm3.

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