Staff Selection Commission Quantitative Aptitude — Question 264

Question

The perimeter of a rectangle is 60m and its length is 18m. Find its area

1. 360 sq.m
2. 378 sq.m
3. 396 sq.m
4. 420 sq.m

Correct answer

C — 396 sq.m

Explanation (English)

2(l+b) = 60, l = 18. So b = 12. Area = 18 × 12 = 216... Wait recalculate: 2(18+b)=60, 36+2b=60, b=12, Area=216

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