The sides of a triangular park are 60 m, 112 m and 164 m.The cost of levelling the park at the rate of ₹8.50/m2 is:
Answer & explanation
Correct answer: option 4
We have,
Side of the triangle are = 60 , 112, 164
Semi perimeter = \(\frac{(60 + 112 + 164) }{2}\) = 168
Area = \(\sqrt {s(s-a)(s-b)(s-c) }\)
= \(\sqrt {168(168-60)( 168-112)( 168-164) }\)
= \(\sqrt {168(108)( 56)( 4) }\)
= 2016m2
The cost of leveling the field at the rate of ₹8.50/m2 is = 2016×8.5 = ₹17,136