Wall Tiling: 200 Tiles & 20,000 cm2

[Natasha1]

Homework Statement

A man tiles a wall with 50 square tiles. Each tile has sides of 20 cm. The wall is ten tiles high and 5 tiles long.

2. Homework Equations
No real equations to use here...

The Attempt at a Solution

What length is the wall?
20 cm x 5 = 100 cm= 1 m

What height is the wall?
20 cm x 10 = 200 cm= 2 m

What is the area of the wall?
50 tiles x 400 cm2 = 20 000 cm2

If he uses square tiles of 10 cm sides, how many tiles would he need?
1 m length / 10 cm tiles = 10 tiles
2 m height / 10 cm tiles = 20 tiles

20 tiles x 10 tiles = 200 tiles used

Am I correct please?

 

[DrClaude]

That looks correct. Some calculations can be arrived at by alternate routes, but what you did is ok.

 

[Natasha1]

Thanks DrClaude!