Exams › SSC CGL (Prelims) › General

A prism has a base perimeter of 30 cm and a height of 7 cm. If its total surface area is 282 cm^2, what is the combined area of its two bases?

1. 42 cm^2
2. 36 cm^2
3. 66 cm^2
4. 72 cm^2

Correct answer: 72 cm^2

Solution

Lateral area = 30*7 = 210 cm^2, so the two bases together account for 282 - 210 = 72 cm^2. Hence 72 cm^2 is correct.

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