Question

find the cost of levelling the ground in the form of a triangle having its side as 70 cm 50 cm 60cm and and at the rupees x7per m​

Answer 1

Answer:

let, a = 70cm

b = 50cm

c = 60cm

s = (a+b+c)/2

s = (70+50+60)/2

s = 180/2

s = 90

area of triangle = √s(s-a) (s-b)(s-c)

area of Δ = √90(90-70)(90-50)(90-60)

area of Δ = √90x20x40x30

area of Δ = √3x3x10x10x2x2x2x10x10x3

area of Δ = 3x10x10x2√2x3

area of Δ = 600√6

cost of levelling = 600√6x7 = 4200√6 Rs.

or

√6 = 2.449 approx.

cost of levelling = 600x2.449x7 = 10285.8 Rs.