Question

A triangular park ABC has sides 52m, 60m and 56m. A gardener Dhania has to put a fence all around it and also plant grass inside. How much area does she need to plant? Find the cost of fencing it with barbed wireat the rate of Rs 20 per metre leaving a space 3m wide for a gate on one side.

Answer 1

Answer:

Step-by-step explanation:

P = 52 + 60 + 56 = 168 m

s = 168 ÷ 2 = 84 m

$A = \sqrt{84(84-52)(84-60)(84-56)} = \sqrt{1806336} = 1344 m^{2}$

$l_{fence} = 168 - 3 = 165 m$

$Cost_{fence} = 165 * 20 = Rs 3300$