Question 63293
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.