Question

the side of triangular park is 5m,7m, 8m.find the cosy of leveling the park at the rate of Rs. 10 per m²

Answer 1

Find the semi-perimeter:

p = (side 1 + side 2 + side 2) ÷ 2

p = ( 5 + 7 + 8) ÷ 2

p = 10 m

Find the area:

area = √p(p-a)(p-b)(p-c)

area = √10(10-5)(10-7)(10-8)

area = √300

area = 17.3 m²

Find the cost to level the park:

1 m² = Rs 10

17.3 m² = 10 x 17.3 = Rs 173

Answer: It costs Rs 173