Question

Find the cost of polishing on a triangular table top whose 's' sides are 4m, 4m , 5m at the rate of Rs. 2m×m. (Using Heron's Formula)

Answer 1

s=(4+4+5)/2=6.5
area =sqrt[6.5(6.5-4)(6.5-4)(6.5-5)]
=sqrt(6.5*2.5*2.5*1.5)=2.5*3.122=7.805 m^2
cost of polishing =Rs 2*7.805=Rs 15.61