The velocity of a river is 2 km/hour. How much time is required to travel a boat in that river for 10 km. downstream then 10 km. upstream. Velocity of boat is 3km./hour in still water.

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25 May 2021 BOATS AND STREAMS The velocity of a river is 2 km/hour. How much time is required to travel a boat in that river for 10 km. downstream then 10 km. upstream. Velocity of boat is 3km./hour in still water.: OPtion
1) 3 hrs
2) 4 hrs
3) 5 hrs
4) 6 hrs
5) 8 hrs
6) 12 hrs
7) 14 hrs
8) 15 hrs
9) 16 hrs
10) none of these; Correct Option: 6 Best Solution (3)

G.S.Kantharao 3 years AGO

Relative speeds =3+2,3-2
Distance=10km,10km
Time taken =10/(3+2)+10/(3-2)
=2+10=12hours
My option is 6👈

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SAYAN CHATTERJEE 3 years AGO

time= 10/(3+2)+10/(3-2)
= 12hrs.
Option 6.

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Varun 3 years AGO

River velocity = 2
Boat velocity = 3
Down side velocity = 2+3 = 5
For 10 = 10/5 = 2
Up side velocity = 3-2 = 1
For 10 = 10/1 = 10
Total = 2+10 = 12 kmph
= Option (6)

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Dimple

India

Punjab

Time: 00:01:33

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The velocity of a river is 2 km/hour. How much time is required to travel a boat in that river for 1

M4maths Previous Puzzles

25 May 2021 BOATS AND STREAMS