3.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
Answer:
Speed
Downstream = (13 + 4) km/hr
=
17 km/hr.
Time
taken to travel 68 km downstream =(68 /
17)hrs
=
4 hrs.
