91.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
[C]
4 hours
[B]
3 hours
[D]
5 hours
92.A
boat moves downstream at the rate of one km in 10 minutes and upstream at the
rate of 4 km an hour. What is the velocity of the current?
[A]
5 km/hr
[C]
1 km/hr
[B]
3 km/hr
[D]
None of these
93.
In a stream running at 2 kmph, a motorboat goes 6 km upstream and back again to
the starting point in 33 minutes. Find the speed of the motorboat in still
water.
94.
A man can row 18 kmph in still water. It takes him trice as long to row up as
to row down the river. Find the rate of stream.
95.
A man can row upstream at 7 kmph and downstream at 10 kmph. Find man’s rate in
still water and the rate of current.
96.A
man can row 7.5 kmph in still water and he finds that it takes him twice as
long to row up as to row down the river. Find the rate of stream.
[A]
2
[C]
2.5
[B]
3
[D]
4
97.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
[C]
2.4 km
[B]
1.8 km
[D]
3.6 km
98.The
current of a stream runs at the rate of 2 km per hr. A motor boat goes 10 km
upstreams and back again to the starting point in 55 min. Find the speed of the
motor boat in still water?
[A]
22
[C]
25
[B]
23
[D]
24
