Find the cost of growing grass in a triangular field of sides 48cm 60cm and 60cm at the rate of ₹5 per sq. cm.
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Semi perimeter of the field (s) =(48+60+60)/2
= 168/2
= 84 cm
By heron's formula,
Area of the triangle = √s(s-a)(s-b)(s-c)
=√84(84-48)(84-60)(84-60)
=√84(36)(24)(24)
=√3024×24×24
=√3024 x 576
=300×5
=1500m^2
Cost of laying grass = 1500×7
=₹10500
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