A Boat goes downstream from one place to another in 9 hours it covers the same distance upstream in 11 hours if the speed of stream is 2 km per hour find the distance between the two places
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Answered by
73
in down stream, time =9
in up stream, time =11
speed of stream=2km/hr
since it covers the same distance c in both direction
using time distance relationship
(x+2)×9=(x-2)×11
9x+18=11x-22
2x=40
x=20km/hr
so the distance between two places
taking downstream into account,
9x (20+2)
=198kms.
will get same result for upstream as well
11×(20-2)
=198kms.
in up stream, time =11
speed of stream=2km/hr
since it covers the same distance c in both direction
using time distance relationship
(x+2)×9=(x-2)×11
9x+18=11x-22
2x=40
x=20km/hr
so the distance between two places
taking downstream into account,
9x (20+2)
=198kms.
will get same result for upstream as well
11×(20-2)
=198kms.
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4
Step-by-step explanation:
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