A man can row
(A) 3 km
(B) 4 km
(C) 5 km
(D) 8 km
A man can row 30 km downstream and return in a total of 8 hours. If the speed of the boat in still water is four times the speed of the current, then the speed of the current is:
(A) 1 km/hr
(B) 2 km/hr
(C) 4 km/hr
(D) 3 km/hr
A man swims downstream distance of 15 km in 1 hour. If the speed of the current is 5 km/ hr, the time taken by the man to swim the same distance upstream is :
(A) 1 hr 30 min
(B) 45 min
(C) 2 hr 30 min
(D) 3 hrs
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