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The speed of a boat in still water is 8 kmph. If it can travel 1 km upstream in 1 hr, What time it would take to travel the same distance downstream?
A. 1 minute
B. 2 minutes
C. 3 minutes
D. 4 minutes
Read Solution (Total 7)
-
- 53% of 42 machines is 53*42/100=22.26 and
48% of 58 machines is 48*58/100=27.84,
so
22.26+27.84 =50.1.. - 9 years agoHelpfull: Yes(22) No(6)
- Speed in Still Water=8 km/hr
Distance travelled in upstream=1 km in 1 hr Therefore speed in upstream =1km/hr
Now, Speed in still water=Speed(upstream)+Speed(Downstream)/2
That is 8=1+ Speed(downstream)/2
So speed in downstream=15km/hr
Now , time taken in downstream= distance/speed=>> 1km/15km/hr=1/15
Converting time in min.=>> 1/15*60 = 4min answer - 9 years agoHelpfull: Yes(12) No(0)
- D. ans 4 min
still water=(downstream + upstream)/2
8=(downstream+1)/2
downstream=15 kmph
1 km distance taken by 4 min - 9 years agoHelpfull: Yes(4) No(0)
- Using alligations, 53-42=11. And 48-11=37. therefore 42+37=79%
- 9 years agoHelpfull: Yes(1) No(8)
- if collecting % of 1st building then, 53+42=95%
n 2nd building is 48%
so, percentage= 48*100/95=50.5%
- 9 years agoHelpfull: Yes(0) No(9)
- ans is 4 mins
- 6 years agoHelpfull: Yes(0) No(0)
- 4 mint...
- 6 years agoHelpfull: Yes(0) No(0)
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