The length of thr

Given sides of triangle a= 26 m, b = 28m, c = 30m

(i) Since the grass has to be planted within the area of triangular field we will calculate area of the triangular field

Area =

Where s is the semi perimeter of triangle and a, b, c are the sides of the triangle

⇒

⇒ s = 42 cm

Area =

=

=

=336 m²

Cost of planting grass = area of triangular field × rate per sq meter

= 336 × 5

= Rs1680

(ii) Since the fencing is to done on the edges, we will calculate the perimeter of triangular field

Perimeter of triangular field = 26 + 28+30

= 84cm

Since 5 meter space has to be left for entrance gate construction

So the total perimeter to be fenced = 84-5 = 79cm

Cost of fencing the triangular field = perimeter of the field to be fenced × rate of fencing per meter

Cost of fencing = 79 × 18

= Rs 1422