Question

The wall is in the shape of a rectangle.

The wall is 3 m wide and 2.5 m high.
The tiles are rectangles 20 cm wide and 25 cm high.
The tiles are sold in boxes.
There are 20 tiles in each box.
Each box of tiles costs £8.50
Work out the total cost of the boxes of tiles Andy needs to buy.
You must show all your working.
(Hint: First find the area, then find the number of tiles needed

Answer 1

Explanation:

Area of wall (including window ) 4.5×3=13.5m

2

Area of window is 80×50+

2

1

×80×20

4000cm

2

+800cm

2

=4800cm

2

=0.48m

2

Area needed to paint 13.5−0.48=13.02m

2

Cost of painting=13.02×158=2057.16