If a man walks 20 km at 5km/hr he will be late 40 minutes. If he walk at 8 km per hr, how early from the fixed time will he reach
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=speed of the man =5km/hr
=total time taken to reach the destination=(20/5)hr=4hr
=actual time of reaching the destination=4hr-40min=3hr and 20 min
=early he will be from the fixed time=(20/8)hr=2.5hr=2hr and 30 min
=time he reached early=
3hr:20min-2hr:30min=50min
answer :::::: 50 min
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