It takes 5 days for a steam boat to travel from a to b along a river it a 7 days to return from b to a how many days will it take for a raft to drift from a to b old speed stay constant
Answers
Time taken if it come with stream speed only = 35 Days , Time taken if Stream speed is ignored = 35/6 days
Step-by-step explanation:
It takes 5 days for a steam boat to travel from a to b along a river
7 days to return from b to a
Let say Speed of Boat = B km/day
Speed of stream = S km/Day
Effective speed = B + S km/Day
Distance = 5 (B + S)
on return effective speed = B - S km/day
Distance = 7 (B - S)
5(B +S) = 7(B - S)
=> 5B + 5S = 7B - 7S
=> 2B = 12S
=> B = 6S
Disancae = 5(6S + S) = 35S
Time taken if it come with stream speed only = 35S/S = 35 Days
Time taken if Stream speed is ignored = 35S/6S = 35/6 Days
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