b) The speed of a boat is 6 km/hr in still water. It is rowed down a stream
flowing at 3 km/hr, for a distance 45 km. How long will the journey last?
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Step-by-step explanation:
speed of boat in still water 6km per hr
speed of downstream 3km per hr
new speed of boat (6+3)km per hr
9km per hr
distance traveled by boat 45km
time taken by boat =distance/speed
=45km/9km/hr
=9 hr
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