Question

Find the cost of leveling the ground which is in the form of triangle having the length of sides as 130m,140m and 150m at rs 5.50 per meter square​

Answer 1

Answer:

Step-by-step explanation:

Here, first we will apply Heron's Formula to find area of this triangle.

s = (130+140+150)/2

  = 420/2

  = 210 m

Area = $\sqrt{s(s-a)(s-b)(s-c)$

        = $\sqrt{210*(210-130)*(210-140)*(210-150)}$

        = $\sqrt{210*80*70*60}$

        = $\sqrt{3*7*5*2*2*2*2*2*5*7*2*5*3*2*2*5}$

        = 3*7*5*5*2*2*2*2

        = 8400 sq. m

Rate = ₹5.50 per sq. m

Cost = Area * Rate

        = 5.50 * 8400

        = ₹46,200

Hope you find it okay.