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22 Jun 2016, 02:53
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
86% (01:40) correct
14%
(02:31)
wrong
based on 72
sessions
History
Date
Time
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The roof of an apartment building is rectangular and its length is 4 times longer than its width. If the area of the roof is 784 feet squared, what is the difference between the length and the width of the roof?
A. 38.
B. 40.
C. 42.
D. 44.
E. 46.
A. 38.
B. 40.
C. 42.
D. 44.
E. 46.
Senthil1981
Joined: 23 Apr 2015
Last visit: 14 Oct 2021
Posts: 225
Given Kudos: 36
Location: United States
Concentration: General Management, International Business
Schools: Booth PT '19 Ross Weekend"19
WE:Engineering (Consulting)
22 Jun 2016, 04:43
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Answer is C : 42
Let w be the width , so length is 4w. Therefore : w*4w = 784, solving for, w = 14 , so 4w-w = 3w = 3*14 = 42
The roof of an apartment building is rectangular and its length is 4 times longer than its width. If the area of the roof is 784 feet squared, what is the difference
between the length and the width of the roof?
A. 38.
B. 40.
C. 42.
D. 44.
E. 46.
(Share a kudo's if you like the explanation)
Let w be the width , so length is 4w. Therefore : w*4w = 784, solving for, w = 14 , so 4w-w = 3w = 3*14 = 42
The roof of an apartment building is rectangular and its length is 4 times longer than its width. If the area of the roof is 784 feet squared, what is the difference
between the length and the width of the roof?
A. 38.
B. 40.
C. 42.
D. 44.
E. 46.
(Share a kudo's if you like the explanation)
22 Jun 2016, 05:17
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Bookmarks
Bunuel
Let the width= x
x*4x=784
x^2= 196
x= 14
Length= 4*14= 56
difference= 56-14= 42
C is the answer
