Question

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 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

Answer 2

Step-by-step explanation:

Length=80m

Base =40m

Height =26m

Perimeter of triangle =sum of all its side

(80 + 40 + 26)m=146m

Area of triangle =1/2 * base * height

=1/2 *40 *26

=20 * 26

=520m^2

Cost of fencing it =Rs 30 per m

So ,Total cost=146 *30

=Rs 4380

Hope it helps.

Thanks.