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11 Jan 2020, 05:43
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D
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From home to office, if James travels at 3/5th of his usual speed, James is late by 12 minutes. What is the time taken at the reduced speed?
A. 21
B. 24
C. 27
D. 30
E. 36
A. 21
B. 24
C. 27
D. 30
E. 36
11 Jan 2020, 05:44
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Bunuel
From home to office, if James travels at 3/5th of his usual speed, James is late by 12 minutes. What is the time taken at the reduced speed?
A. 21
B. 24
C. 27
D. 30
E. 36
A. 21
B. 24
C. 27
D. 30
E. 36
TWIN QUESTION: https://gmatclub.com/forum/from-home-to ... 14148.html
11 Jan 2020, 06:06
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Let speed be x mph
Reduced speed would then be 3/5x mph
T = D/S = D/x (let distance be D and time be T)
D = Tx ....1
Time taken at reduced speed, T+12 = D÷3/5x = 5Dx/3 ....2
Now, put 1 in 2
T+12 = Tx÷3/5x
T+12 = 5T/3
3T+36 = 5T
36 = 2T
T = 18
Therefore, time taken at reduced speed = T+12 = 18+12= 30mins
Answer - D
Posted from my mobile device
Reduced speed would then be 3/5x mph
T = D/S = D/x (let distance be D and time be T)
D = Tx ....1
Time taken at reduced speed, T+12 = D÷3/5x = 5Dx/3 ....2
Now, put 1 in 2
T+12 = Tx÷3/5x
T+12 = 5T/3
3T+36 = 5T
36 = 2T
T = 18
Therefore, time taken at reduced speed = T+12 = 18+12= 30mins
Answer - D
Posted from my mobile device
