If the speed of boat in still water is 10 km/hr and the speed of the stream is 3km/hr ,the boat rows to a place which is 50km far and returns through the same path. What would be the average speed of boat during the journey ?
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Answered by
1
Answer:
2.5km/hr
Step-by-step explanation:
Solution:
Given Equation: Speed of boat in still water =10 km\hr
Boat Travels a distance of 37.5 km in time 5 hr.
Factor to consider speed of stream be 's'
According to the formula:
Speed =
Time
Distance
Total speed = speed of boat in still water and speed of stream
Since the boat travels upstream
Total speed = Speed of boat in still water - speed of water in stream
10−s=
5
37.5
10−s=7
2
1
s=2.5 km\hr
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answer
2.5km/hr is the answer
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