One side of a rectangular field is 4 meters and its diagonal is 5 meters. The area of the field is:

  1. 12 m2
  2. 15 m2
  3. 20 m2
  4. 4√5 m2
Explanation

Answer A

First find the other side of the rectangle:

L2 +B2 = D2
B2 = D2 - L2 = 25-16 =9
B= 3 meter
Area = L x B = 4 X 3 = 12 m2

Key takeaway: In GMAT, word problems based on only basic geometry are asked . You should remember simple formulae ( perimeter, area ) of rectangle, square, circle etc. and their application.

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