If an employee walks at speed of 10 km at 3 km/hr, he will be late by 20 minutes. If he walks at 4 km/hr, how early from the fixed time he will reach ?
(A)
18 minutes
(B)
24 minutes
(C)
30 minutes
(D)
36 minutes
Answer: (C)
Explanation:
Time taken at 3 km/hr = Distance/speed = 10/3
Actual time is obtained by subtracting the late time
So, Actual time = 10/3 – 1/3 = 9/3 = 3 hour
Time taken at 4 km/hr = 10/4 hr
Time difference = Actual time – time taken at 4 km/hr = 3 – 10/4 = 1/2 hour
Hence, he will be early by 30 minutes.
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Last Updated :
03 May, 2019
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