213,235 views
23 votes
23 votes
7. how many tiles measuring

20cm x 20cm
are needed to tile a bathroom 3.5m long
and 2.8m wide?

User Groben
by
3.4k points

1 Answer

24 votes
24 votes

Answer:

245 tiles

Explanation:

1 meter = 100 cm

Area of bathroom = 3.5m x 2.8m = 350x280 = 9800 cm²

Area of each tile = 20cm x 20cm = 400 cm²

Total number of tiles required = 9800/400 = 245

Note

Strictly speaking we have to find out how many tiles can be fitted in the length and breadth of the bathroom. Since the bathroom is 350 cm wide, we can fit 350/20cm = 17.5 tiles. However, there is no concept of 1/2 tile so the question has an ambiguity. along the width, we can fit 280/10 = 14 tiles

17.5 x 14 = 245 but if the question is reworded to how many tiles do we need to purchase to floor the bathroom it would be 18 x 14 = 252

User Octopus
by
2.9k points