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McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

2. Surface Areas of Prisms and Cylinders

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Exercise 47 Page 821

Find the perimeter and the area of the floor.

H

Practice makes perfect

We are asked to find the cost to install hardwood flooring in a room that is 18 by 15 feet.

The cost depends on the area and the perimeter of the floor. Let's find them.

	Floor
Length	l= 18
Width	w= 15
Perimeter	P=2 l+2 w=2( 18)+2( 15)=66
Area	A= l w=( 18)( 15)=270

The perimeter of the room is P=66 feet and its area is A=270 square feet. Now, let's find the cost of each part of installing hardwood flooring.

Subflooring: It costs $2.25 per square foot. Since the area is 270 square feet, the cost of this part is 270* $ 2.25= $ 607.50.
Wood Flooring: It costs $4.59 per square foot. Therefore, the cost of this part is 270* $4.59= $1239.30.
Baseboards It costs $1.95 per linear foot around room. Since the perimeter is 66 feet, the cost of this part is 66* $1.95= $ 128.70.
Nail & Other Materials: It costs $25.95 per job.
Labor: It costs $99 plus $0.99 per square foot. This tells us that the cost of this part is $99+270* $0.99= $366.30.

Now, let's add the above costs.

Total Cost:
$607.5+$1239.3+$128.7+$25.95+$366.3 = $ 2367.75

The answer corresponds to option H.

Subchapter links

Exercises p.817-821