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SSC CGL 2021 PYQ — Question 70

SSC CGL - 17 Aug 2021 - Shift 2 • Quantitative Aptitude • Q70

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What is the volume (in cm3) of a spherical shell whose inner and outer radii are respectively 2 cm and 3 cm?

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Correct answer: D

Explanation

The correct answer is Option 4 i.e  76π3\frac{76 \pi}{3}.

The volume of a hollow sphere = 43π(R3−r3)\frac{4}{3} \pi (R^3 - r^3)

Required volume = 43π(33−23)\frac{4}{3} \pi (3^3 - 2^3)= 76π3\frac{76 \pi}{3}