# Thread: How many of X are need to cover a space of X metres squared?

1. ## How many of X are need to cover a space of X metres squared?

Hi, I've started what I think is geometry... ^^' and I'm stumbling at this first practical question. Any help is really appreciated!

A panel of glass is 180cm2, 80cm2 of bue glass and 80cm2 of clear glass.
How many panels are needed if the blue glass used covers an area of 4.48m2?

I thought convert cm to metres so 80/100 = 0.8m2 and then 4.48m2/0.8m2 = 5.6panels, but the books answer is 560 panels are needed. What do I not understand?
Thank you

2. ## Re: How many of X are need to cover a space of X metres squared?

Originally Posted by Dumplum
Hi, I've started what I think is geometry... ^^' and I'm stumbling at this first practical question. Any help is really appreciated!

A panel of glass is 180cm2, 80cm2 of bue glass and 80cm2 of clear glass.
How many panels are needed if the blue glass used covers an area of 4.48m2?

I thought convert cm to metres so 80/100 = 0.8m2 and then 4.48m2/0.8m2 = 5.6panels, but the books answer is 560 panels are needed. What do I not understand?
Thank you
It's really kind of bad form to post in multiple locations simultaneously. In any case, converting SQUARE CM to SQUARE M requires a SQUARED conversion.

80 cm^2 * (1/100)^2 m^2