The sides of a triangular park are 35 m, 53 m and 66 m. The cost of levelling the park at the rate of ₹9.25/ m$^2$ is:
Answer & explanation
Correct answer: option 2
We have,
Side of the triangle are = 35, 53, 66
Semi perimeter = \(\frac{(35 + 53 + 66) }{2}\) = 77
Area = \(\sqrt {s(s-a)(s-b)(s-c) }\)
= \(\sqrt {77(77-35)( 77-53)( 77-66) }\)
= \(\sqrt {77(42)( 24)( 11) }\)
= 924m2
The cost of leveling the park at the rate of ₹9.25/m2 is = 9000 ×7.4 = ₹8,547