11. Carlos is laying tiles on his kitchen floor. The floor is in the shape of a trapezium as shown.
3.6 m(b)
2.8 m(a)
2.5 m(height)

Carlos chooses rectangular tiles measuring 30 cm by 22.5 cm.
The tiles come in packs of 14.

Carlos estimates the number of tiles he will need by dividing the area of the floor by the
area of a tile.

(a) Using Carlos' method, find an estimate for the number of packs of tiles Carlos will
need.