If the speed of a boat in still water is
12 km/h and the speed of the stream is
8 km/h, calculate the time taken by the boat
to move.
(i) 16 km upstream
(ii) 40 km downstream
Answers
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2
Answer:
1) 4 Hours
2) 2 Hours
Step-by-step explanation:
Speed of boat in still water = 12 km/h
Time it will take to move 16 km upstream:
Speed while moving upstream = Speed of boat in still water - Speed of stream
= 12 km/h - 8 km/h
= 4 km/h
Distance to cover = 16 km/h
Time = Distance/Speed
= 16/4
= 4 hours
Time it will take to move 40 km downstream:
Distance to cover = 40 km
Speed while moving downstream = Speed in still water + Speed of stream
= 12 km/h + 8 km/h
= 20 km/h
Time = Distance/Speed
= 40/20
= 2 hours
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