A triangular park has sides 80 m . 40 m and 26 m Gardener has to put fence all around its boundary and also plant grass inside. Find the area in which grass will be planted also calculate the cost of fencing it with barbed wire at the rate of Rs. 30 per m

A triangular park has sides 80 m . 40 m and 26 m Gardener has to put f

1.	A triangular park has sides 80 m . 40 m and 26 m Gardener has to put fence all around its boundary and also plant grass inside. Find the area in which grass will be planted also calculate the cost of fencing it with barbed wire at the rate of Rs. 30 per m
Answer» here, a=120m,b=80m,c=50mand, s= 2a+b+c = 2250 =125Area she need to plant grass = s(s−a)(s−b)(s−c) = 125(125−120)(125−80)(125−50) =375 15 m 2 cost of FENCING =[(a+b+c)−3].20=[250−3].20=Rs4940