11. Determine the perimeter and cost of fencing the triangular plot

The sides of a triangular park are 13 $m$, 13 $m$ and 21 $m$. The cost of fencing the triangular park is $₹$21 $per \ meter$. Find the perimeter of the triangular park and the total cost of fencing the triangular park.

 

The perimeter of the triangular park $=$  $m$

 

The total cost of fencing the triangular park $= \ ₹$