Question

the sides of a triangular ground are 5m,7m and 8m respectively.find the cost of leveling the ground at the rate of rupee 10 per meter square​

Answer 1

sides of triangle are = 8m ,5m and 7m

the rate of leveling the ground is ₹10 /msq

area of triangle =1/2 bh

                          so as we dont have a hieght

   a^2+b^2 =c^2

a+b=c

h+16=25

h=9

h=3

area of triangle = 1/2 bh

                          =1/2 4x3

                           = 2x3          = 6m sq.

area of 2nd triangle 1/2 b h

                                   1/2 4 x7

                                  = 14 m sq.

    area of total triangle =  20 m sq .

cost of the area = 20 m sq x ₹ 10

                          = ₹200