Q. 63.9( 10 Votes )

The perimeter of a triangular field is 144 m and the ratio of the sides is 3 : 4 : 5. Find the area of the field.

Answer :

Sides of triangle are in ratio: 3 : 4 : 5



Since the perimeter of a triangle is given by:






Therefore sides of the triangle are:





When a, b and c are the sides of triangle and s is the semi-perimeter, then its area is given by:


A = where [Heron’s Formula]


= = 72


A =


A = = cm2


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