Divide the diagram to a square and triangle Square = 12*12= 144m2 Triangle = 1/2 * 8*12= 48m2 Total area = 144+48=192m2 Price of weed killer needed for 1m = 19.75 divided by 100 = 0.1975 Weed killer needed for 92m2 = 0.1975*92=18.17 Weed killer needed for the whole land 19.75+18.17= £37.92
