SOLUTION: Rashad wants to wallpaper the four walls of his bedroom. the room is rectangular and measures 11 feet by 13 feet. the cieling is 10 feet high. a roll of wallpaper at a store is 2.5

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Question 63293This question is from textbook discovering geometry
: Rashad wants to wallpaper the four walls of his bedroom. the room is rectangular and measures 11 feet by 13 feet. the cieling is 10 feet high. a roll of wallpaper at a store is 2.5 feet wide and 50 feet long. how may rolls should he buy? This question is from textbook discovering geometry

Found 2 solutions by jai_kos, ikleyn:
Answer by jai_kos(139)   (Show Source):
You can put this solution on YOUR website!
Look at the room carefully, the length of the room is 13 feet
And the width = 11feet
Heigth = 10feet
The area of the one side of the room = 2( 13 * 10) = 160 feet
The area of the another side of the room is = 2(11*10 ) = 220feet
Therefore the total roll area = 220 + 160 = 380feet

Since one roll is 2.5 * 50 = 125 feet
Therefore "x" number of rolls = 380 rolls
= 380 / 125 = 3.04 rolls

Therefore we require 3.04 rolls to cover a rectangular room on all four sides.

Answer by ikleyn(53742)   (Show Source):
You can put this solution on YOUR website!
.
Rashad wants to wallpaper the four walls of his bedroom. the room is rectangular and measures 11 feet by 13 feet.
the cieling is 10 feet high. a roll of wallpaper at a store is 2.5 feet wide and 50 feet long. how may rolls should
he buy?
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        The solution in the post by other person is incorrect.
        See my correct solution below.

The surface area to cover by wall paper is the area of four walls

        11*10 + 13*10 + 11*10 + 13*10 = 480 ft^2.

The area of one roll is 2.5*50 = 125 ft^2.

Find the ratio = 3.84.

We should round this decimal, 3.84, to the closest GREATER integer number, which is 4.

ANSWER.   Rashad should buy 4 roll of wallpaper.

Solved correctly.