Question

Help me! I'm lost!

The wall in in the shape of a rectangle. The wall is 3m wide and 2.5m high. .The tiles are rectangles 20cm wide and 25cm 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.

Answer 1

£68

Explanation:

• Width of wall = 3m = 300 cm
• Height of wall = 2.5m = 250 cm

Width of one tile = 20cm

Calculate how many tiles you need to fit the width of the wall:

width of wall ÷ width of tile = 300 ÷ 20 = 15 tiles wide

Height of one tile = 25cm

Calculate how many tiles you need to fit the height of the wall:

height of wall ÷ height of tile = 250 ÷ 25 = 10 tiles high

Therefore, total tiles needed = 15 x 10 = 150 tiles

If there are 20 tiles in each box,

total tiles ÷ 20 = 150 ÷ 20 = 7.5 boxes

So we need to round this UP to 8 boxes (else we won't have enough tiles)

Therefore, 8 boxes of tiles at £8.50 per box:

Total cost = 8 x 8.50 = £68