A triangular park ABC has sides 120 m, 80 m and 50 m (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 ?

Options

A. `375sqrt15 m^2`
B. `275sqrt5 m^2`
C. `125sqrt15 m^2`
D. `135sqrt15 m^2`.