Quantitative Aptitude :: Time and Distance - Discussion
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Sanu travelled a distance of 20 kms at the speed of 5 km/hr, he reached 40 minutes late. If he had walked at the speed of 8 km/hr, how early from fixed time will he reach?
A15 mins
B50 mins
C25 mins
D1.5 hrs.
Show Explanation
Time taken to travel 20 kms at the speed of 5 kmph.
=> t = 20/5 = 4 hrs.
Actual time of reaching = (4 hrs - 40 mins) = 3 hrs 20 mins ......(1)
Time taken to travel 20 kms at the speed of 8 kmph.
=> t = 20/8 = 2.5 hrs. ......(2)
Difference between (1) and (2) => (3 hrs 20 mins - 2 hrs 30 mins)
(200 mins - 150 mins) = 50 mins.
Sanu would have reached 50 mins earlier.
Asked In ::
I didn't get how time 3 hr 30 min is calculated..?
Please explain if anyone knows...
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