The cost of levelling a ground in the form .... -Maths 9th

The cost of levelling a ground in the form .... -Maths 9th
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1 Answer

Answer :

True, Let a = 51m,  b = 37m,  c = 20m s = (a + b + c)/2 = (51 + 37 + 20)/2 = 108/2 = 54 m ∴  Area of triangular ground = root under(√s(s - a)(s - b)(s - c)) = root under√54(54 - 51)(54 - 37)(54 - 20)  = root under (√54 x 3 x 17 x 34) = 306 m2 Cost of levelling the ground = Rs 3 x 306 = Rs 918
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