2. Example Problems II

A triangular park \(ABC\) has sides \(120m\), \(80m\) and \(50m\) (see Fig.). 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 wire at the rate of \(Rs.20\) per metre leaving a space \(3m\) wide for a gate on one side.

 

 

Total cost of fencing \(=Rs\)