The length and breadth of a rectangular field are in ratio 4:3. If the perimeter is 140 m, find its length.

A30 m

B40 m

C50 m

D60 m

Explanation

Perimeter = 2(4x + 3x) = 14x = 140 => x = 10. Length = 4x = 4 * 10 = 40 m.

Exam Relevance

Topic: Geometry, Mensuration & Trigonometry
Subtopic: Perimeter & Area

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