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What is the cost in dollars to steam clean a room W yards wide and L

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What is the cost in dollars to steam clean a room W yards wide and L  [#permalink]

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New post 08 Aug 2019, 02:18
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A
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C
D
E

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  45% (medium)

Question Stats:

58% (01:11) correct 43% (01:29) wrong based on 40 sessions

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Re: What is the cost in dollars to steam clean a room W yards wide and L  [#permalink]

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New post 08 Aug 2019, 05:30
Bunuel wrote:
What is the cost in dollars to steam clean a room W yards wide and L yards long it the steam cleaners charge 10 cents per square foot? (1 yard = 3 feet)

A. 0.9WL
B. 0.3WL
C. 0.1WL
D. 9WL
E. 3WL


What is the cost in dollars to steam clean a room W yards wide and L yards long it the steam cleaners charge 10 cents per square foot? (1 yard = 3 feet)

Room area = 3W * 3L = 9WL
cost in dollars to steam clean the room = 10 * 9WL = 90 WL cents = $.9WL

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Re: What is the cost in dollars to steam clean a room W yards wide and L  [#permalink]

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New post 11 Aug 2019, 19:46
Bunuel wrote:
What is the cost in dollars to steam clean a room W yards wide and L yards long it the steam cleaners charge 10 cents per square foot? (1 yard = 3 feet)

A. 0.9WL
B. 0.3WL
C. 0.1WL
D. 9WL
E. 3WL



The area of the room is 3W * 3L square feet. Notice that 10 cents is 1/10 of one dollar. Thus, the cost to clean the room is:

3W * 3L * 1/10 = 9WL/10 = 0.9LW

Answer: A
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Re: What is the cost in dollars to steam clean a room W yards wide and L   [#permalink] 11 Aug 2019, 19:46
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