Question

find the area of triangular groung having sides 51m, 37m, 20m also find the cost of levelling the ground if 1cm^2 cost is Rs. 3
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Answer 1

Answer:

Step-by-step explanation:

Let sides of a triangle be a =51m, b=37 m and c =20 m

Now, semi-perimeter of triangle.

s=a+b+c2=51+37+202=1082=54m

∴ Area of triangle=√s(s−a)(s−b)(s−c)                      [by Heron's formula]

=√54(54−51)(54−37)(54−20)

=√54×3×17×34

=√9×3×2×3×17×17×2

=3×3×2×17

=306 sq. m

∵cost of levelling per sq. m=Rs. 3

∴cost of levelling per 306 sq. m=3×306=Rs. 918