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A boat takes 19 hours for travelling downstream from point A to point B and coming back to a point C midway between A and B. If the velocity of the stream is 4 kmph and the speed of the boat in still water is 14 kmph, what is the distance between A and B ?
A. 160 km
B. 180 km
C. 200 km
D. 220 km
Read Solution (Total 3)
-
- Down Stream Speed :(14+4)km/hr =18 km/hr
Up Stream Speed:(14-4)km/hr=10km/hr
(x/18)+(x/2/20)=19
x=180km - 11 years agoHelpfull: Yes(1) No(0)
- Downstream= 14 + 4 =18kmph
Upstream = 14 - 4 = 10kmph
Time taken 19hrs
Then assume the distance is X,
X/18-X/2*10 =19
19X/180 =19
>>X = 180Kms - 8 years agoHelpfull: Yes(0) No(0)
- Let the distance be D
Given that=D/(14+4)+ D/2/(14-4)
=D/18+D/20=19
=(10D + 9D)/180= 19
=19D = 19 x 180
=D= 180 KM - 5 years agoHelpfull: Yes(0) No(0)
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