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The speed of a boat in still water is 15 km/hr and the rate of current is 3 km/hr. The distance travelled downstream in 12 minutes is
A. 1.2 km
B. 1.8 km
C. 2.4 km
D. 3.6 km

Read Solution (Total 1)

B = 15km/hr, S= 3km/hr, Downstream B+S = 15+3 =18 km/hr
down stream time t = 12 min, we have to change it to hours so t = 12/60=1/5 hrs.
Distance = Speed*time = 18*1/5 = 3.6 km.
ans is D.
8 years agoHelpfull: Yes(0) No(0)

GENPACT Other Question

A boat can travel with a speed of 13 km / hr in still water. If the speed of the stream is 4 km / hr. find the time taken by the boat to go 68 km downstream?
A. 2 hours
B. 3 hours
C. 4 hours
D. 5 hours 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