ISEE Mathematics Achievement Question 21: Answer and Explanation
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Question: 21
7. A square measures 8 inches on one side. By how much will the area be increased if its length is increased by 4 inches and its width decreased by 2 inches
- A. 14 sq. in.
- B. 12 sq. in.
- C. 10 sq. in.
- D. 8 sq. in.
Correct Answer: D
Explanation:
The correct answer is (D). Area = length × width
Area of square = 8 × 8 = 64 sq. in.
Area of rectangle = (8 + 4)(8 - 2) = 12 × 6 = 72 sq. in.
72 - 64 = 8 sq. in.