the speed of a boat in still water is 20 kmph and the speed of the stream is 5 kmph .the distance travelled upstream is 20 mine is
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Explanation:
Speed of boat in upstream = 15 km/hr
Distance = 1.5 km
Time = t
1
=
15
1.5
= 6 min
Distance move by float in this time
5×
10
1
=
2
1
km
Speed of boat w.r.t. float,
20km/hr,t
2
=
20
2 km
= 6 min.
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