Discussion of Question with ID = 018 under Areas

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Question

The difference between the length and breadth of a rectangle is 2 m. What is the area if the perimeter is 8 meters?

A

3 sq. meters.

B

5 sq. meters.

C

9 sq. meters.

D

7 sq. meters.

Soln.
Ans: a

If L and B are the length and breadth of the rectangle, then L - B = 2 and 2(L + B) = 8. Solving, we get L = 3 and B = 1, so the area is 3 × 1 = 3 sq. m. TIP: Sometimes long multiplications can be avoided by looking at the units place of the given options.


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