Mick plans to cover two walls of his rectangular room with wallpaper, as shown below.

A roll of wallpaper is 10 meters long and 0.7 meters wide. Assuming that there is no wastage, how many rolls of wallpaper would Mick require to cover the two walls?

What is the equation for solving this problem?

Question

Mick plans to cover two walls of his rectangular room with wallpaper, as shown below.
 

 
A roll of wallpaper is 10 meters long and 0.7 meters wide. Assuming that there is no wastage, how many rolls of wallpaper would Mick require to cover the two walls?

What is the equation for solving this problem?

anonymous · Answer

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anonymous · Answer

I don't know the steps I need to take to solve this. :/
Could someone help me with this one? :)

anonymous · Answer

total area to be covered = 2 * 7^2 = 98 sq m
so we need 98 sq m of wallpaper to cover it
let x be the number of rolls of wallpaper 
and 1 roll of wallpaper has an area  0.7 * 10 = 7 meters
the equation is
7x = 98
so x = 98 / 7 = 14 rolls