Exams › SSC CGL (Prelims) › General

The sides of a triangular field are in the ratio 3:4:5 and its perimeter is 120 m. What is its area?

1. 600 m^2
2. 500 m^2
3. 750 m^2
4. 800 m^2

Correct answer: 600 m^2

Solution

The ratio parts sum to 12, so each part is 120/12 = 10 m, giving sides 30, 40 and 50 m. Since 3:4:5 is a right triangle, area = (1/2) x 30 x 40 = 600 m^2.

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