Rakesh is the owner of a rectangular field. Because of the construction of an expressway near his field, the length and breadth of his field are reduced by 30% and 10%, respectively. What is the percentage decrease in the area of his field?
A.35%
B.40%
C.37%✓ Correct
D.33%
Explanation
New area = (1 − 0.30)(1 − 0.10) × original area = 0.70 × 0.90 = 0.63 of original. Percentage decrease = (1 − 0.63) × 100 = 37%.
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