Accenture
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Numerical Ability
Boats and Streams
In a stream running at 2kmph,a motar boat goes 6km upstream and back again to the starting point in 33 minutes.find the speed of the motarboat in still water.
Read Solution (Total 4)
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- Ans is 22km/h
let X is the speed of the boat in still water
from the given data
6000/(x-2000/60)+6000/(x+2000/60)=33-----(1)
solve equation 1 for X you will get x=22kmph - 10 years agoHelpfull: Yes(9) No(0)
- let speed of boat in still water is u.
distance=6km(given)
in upstream speed=(u-2)
where stream speed=2
in down stream speed=(u+2)
so,d/(u-2)+d/(u+2)=33/60
6/(u-2)+6/(u+2)=33/60
solve and get u=22
so speed of boat in still water=22kmph - 10 years agoHelpfull: Yes(6) No(0)
- 6/(x-2)+6/(x+2)=33/60
x=(284/11)^.5 - 10 years agoHelpfull: Yes(1) No(4)
- speed of the stream s=2kmph
speed of the boat b=xkmph
distance of up stream d(up)=6km
distance of up stream d(down)=6km
[d(up)/(b-s)]+[d(down)/(b-s)]=33/60
by this we can get b=33/720 kmph - 10 years agoHelpfull: Yes(0) No(3)
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