Question

The cost of levelling the ground in the form of triangle having sides 51m 37m and 20m at the rate of ₹3 per m² is₹918

Answer 1

the statement is false because
half perimeter(s)= (51+37+20)/3 =36

using Heron's formula area of triangle = 24 square root 15 meter square

cost of levelling = 24 square root 15 X 3 = Rs 278.85

Answer 2

your answer refer to attachment..

it's by heron's formula...