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Thursday, November 17, 2011

Nils' Textbook Question 2.4


Question 20

Leon's rectangular living room is 8.2m by 4.5m. A square rug covers 2/5 of the area of the floor. What is the side length of the rug, to the nearest tenth of a metre?

First off we have to figure out the area of the room before we find the rug. So the formula for a rectangle is l x w.
8.2 x 4.5 = 36.9m
That is the area of the room. The rug is 2/5 the size of the room. So we multiply the area by 0.4. (Remember! 0.4 = 2/5)
36.9 x 0.4 = 14.76m
14.76 is the area of the square rug.
To find the side length of the square rug we have to square root it.
the square root of 14.76 = 3.8m
(I apologize for not having a symbol for square rooting. If anyone has suggestions please comment.)
So the side length of the square rug is 3.8m.

Thanks for reading this post. If you have comments or suggestions please comment below. Bye!

1 comment:

  1. Haha I noticed I put 4.2 instead of 2.4 so I changed that.