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Post-UTME Mathematics 2018 Objective — Question 16

Question 16 of 20 from the Post-UTME Screening (Post-UTME) Mathematics 2018 Objective paper, with the correct answer and a full explanation.

Find, to the nearest cm3, the volume of a sphere of radius 2.1cm. [pi = 22/7]

A. 10cm3
B. 22cm3
C. 39cm3Correct
D. 117cm3

Explanation

V = (4/3)pi.r^3 = (4/3)(22/7)(2.1)^3 = 38.8, approximately 39cm3.

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