The speed of a river current is 6 km/hour and the
actual speed of a boat in still water is 15 km/
hour. What distance will the boat cover in 4 hours
40 minutes along the current in that river ?
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Answer:
along the current, speed of boat = 15 + 6 = 21 km/hr
time = 4.67 hrs
distance = speed x time = 21 x 4.67 = 98 km
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