Question

A roll of wall paper is 100 feet long and 24 inches wide. It will be used to cover four
walls. Each wall is 8 feet high and 12 feet long. How many rolls of wall paper must be
bought?
(a) 1 roll
(b) 3 rolls
C 2 rolls
d) 5 rolls​

Answer 1

Answer:

2 rolls

Step-by-step explanation:

area of roll 100*2= 200 (24 inch = 2 feet)

req area = 384( 4*8*12)

Answer 2

The number of rolls of wallpaper required is (C) 2 rolls.

Given: A roll of wallpaper is 100 feet long and 24 inches wide.

Each wall is 8 feet high and 12 feet long.

The number of walls to be covered = 4.

To Find: The number of rolls of wallpaper required.

Solution:

• We need to cover the walls so, we need to find the area of each wall to be covered.
• We all need to find the area each roll of wallpaper covers.
• Dividing the total area to be covered by the area each roll of wallpaper covers gives us the number of rolls required.

Coming to the question,

Area of each wall = ( 12 × 8 ) ft²

                             = 96 ft²

The number of walls to be covered = 4

So, the total area to be covered = ( 96 × 4 ) ft²

                                               = 384 ft²

The area covered by each roll = ( 100 × 2 ) ft²     [ As 24 inches = 2 feet]

                                                   = 200 ft²

So, the number of rolls required = 384 / 200

                                                        = 1.92

                                                        ≅ 2

Hence, the number of rolls of wallpaper required is (C) 2 rolls.

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