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13 Mar 2017, 08:06
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C
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Difficulty:
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Question Stats:
97% (00:58) correct
3%
(01:03)
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based on 93
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Working alone Jane can assemble 9 model cars in 7 hours, how long will it take her to assemble 12 model cars?
A. 9/7
B. 7/12
C. 28/3
D. 10
E. 14
A. 9/7
B. 7/12
C. 28/3
D. 10
E. 14
13 Mar 2017, 09:01
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Rate of assembling Car = 7/9
Time taken to assemble 12 cars = 12 * 7/9 = 28/3
Answer is C. 28/3
Time taken to assemble 12 cars = 12 * 7/9 = 28/3
Answer is C. 28/3
Updated on: 02 Apr 2020, 07:55
Originally posted by BrentGMATPrepNow on 13 Mar 2017, 11:34.
Last edited by BrentGMATPrepNow on 02 Apr 2020, 07:55, edited 1 time in total.
Last edited by BrentGMATPrepNow on 02 Apr 2020, 07:55, edited 1 time in total.
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Bunuel
Working alone Jane can assemble 9 model cars in 7 hours, how long will it take her to assemble 12 model cars?
A. 9/7
B. 7/12
C. 28/3
D. 10
E. 14
A. 9/7
B. 7/12
C. 28/3
D. 10
E. 14
Given: Jane can assemble 9 model cars in 7 hours
RATE = output/time
= (9 cars)/(7 hours)
= 9/7 cars/hour
How long will it take her to assemble 12 model cars?
Time = output/rate = 12/(9/7)
= (12)(7/9)
= 84/9
= 28/3 hours
Answer: C
