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30 Jun 2015, 04:56
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
88% (01:31) correct
13%
(02:09)
wrong
based on 448
sessions
History
Date
Time
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An empty bucket being filled with paint at a constant rate takes 6 minutes to be filled to 7/10 of its capacity. How much more time will it take to fill the bucket to full capacity?
A. 7/18
B. 9/18
C. 2
D. 18/7
E. 18/5
Kudos for a correct solution.
A. 7/18
B. 9/18
C. 2
D. 18/7
E. 18/5
Kudos for a correct solution.
06 Jul 2015, 02:10
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Bookmarks
Bunuel
MANHATTAN GMAT OFFICIAL SOLUTION:
Use the RT = W equation to solve for the rate, with t = 6 minutes and w = 7/10:
r(6 minutes) = 7/10
r = 7/60 buckets per minute.
Then, substitute this rate into the equation again, using 3/10 for w (the remaining work to be done):
7/60*t = 3/10;
t = 18/7.
Answer: D.
30 Jun 2015, 05:18
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An empty bucket being filled with paint at a constant rate takes 6 minutes to be filled to 7/10 of its capacity. How much more time will it take to fill the bucket to full capacity?
A. 7/18
B. 9/18
C. 2
D. 18/7
E. 18/5
Solution -
Work and Time are directly proportional. W1/W2=T1/T2
7/10 work in 6 mins
1 work in T mins
(7/10)/1 = 6/T -> T = 60/7 mins.
Remaining minutes to fill the tank = 60/7 - 6 = 18/7 mins. ANS D.
A. 7/18
B. 9/18
C. 2
D. 18/7
E. 18/5
Solution -
Work and Time are directly proportional. W1/W2=T1/T2
7/10 work in 6 mins
1 work in T mins
(7/10)/1 = 6/T -> T = 60/7 mins.
Remaining minutes to fill the tank = 60/7 - 6 = 18/7 mins. ANS D.
