Math problem?

Question

Alice is going to pave her courtyard. She is going to pave an area of 12m2. How many 10 X 20cm pavers will she need?

How do you work it out? Can you please go through it so i understand how to work it out? Thanx.

The answer is 600. I jsut don't know how they get that.

Answer 1

The area of each paver is 10cm x 20cm
.................... which is ... 0.1m x 0.2m = 0.02m²

SO she needs 12 / 0.02 = 600 of them.

Answer 2

So we have 12m^2. Now we find the area of this in centimeters. To do this we multiply 12*100*100. This is done because each dimension of meters (x and y) has 100 cm. This gives us 120,00cm^2. Now divide this answer by the area of the pavers (10*20=200) we get 120,000/200=600.

Answer 3

no of pavers = area of courtyard/area of one paver

now area of one paver = 10x12 cm^2
= 10/100X12/100 m^2
=1/50 m^2
no of pavers= 12 / 1/50
= 12x50
=600

Answer 4

12m^2=12*100*100 cm^2.
area of one paver=10*20=200cm^2
the number of pavers needed=12*100*100/200=600.answer

Answer 5

Each tile measures 10 x 20 cm or 0.1 x 0.2 m, giving an area of 0.02 m^2.

The total area to be covered is 12 m^2, which means that the total number of tiles required is

12 / 0.02 = 600 tiles

Answer 6

Each paver has an area of
.1m x .2m = .02 m² so, to get 12 m² she will need
12 / .02 = 600 pavers.

HTH

Doug

Answer 7

1 m^2 = 1m X 1m
1m = 100cm
1 m^2 = 100cm x 100cm
1 m^2 = 10,000cm^2
12m^2 = 120,000cm^2

paver = 10cm X 20cm
paver = 200cm^2

120,000cm^2 / 200cm^2 = 600 pavers.

Answer 8

I have no idea how to work that out, but as everyone else said 600 tiles, I am going to say 600 tiles too.

Answer 9

10x20=200 cm2

12 m2 means 120000cm2

if you divide 120000 into 200, you can find 600