Answer:

242.5m2

Step-by-step explanation:

base of triangle=4.5m+4.5m+10m

                         =19m

area of triangle = 1/2 x 19mx15m

                          =142.5m2

  area of square=10mx10m

                           =100m2

           total area=100m+142.5m

                           =242.5m2