Question

please give correct answer ​

Answer 1

Perimeter of triangle = 50+120+80

= 250m

semi perimeter = 250/2

=145m

Leaving space for gate perimeter requires = 250-3 = 247m

cost of fencing = 247× 20

=4940 Rs.

Step-by-step explanation:

Planting = area of triangular park

$\sqrt{s(s - a)(s - b)(s - c)}$

a = 50m

b =80m

c =120m

s =145

ans... = 11394.26m²