Question

Q.11. A triangular park ABC has
sides 40m ,32m and 24m. A
gardener Balram has to put a
fence all around it and also plant
grass inside. How much area
does he need to plant? Find the
cost of fencing it with barbed
wire at the rat of Rs 20 per meter
leaving a space 3m wide for a
gate on one side.​

Answer 1

Answer⤵️⤵️

here, a=120m,

b=80m,

c=50m

and, s=

2

a+b+c

=

2

250

=125

Area 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

Hope it helps u dear