Boats and Streams

1.   A person can row 750 metres  against the stream in 11 ¼ minutes and returns in 7 ½ minutes. The

      speed of the person in in still water is :

      a) 2 km/hr b)3 km/hr         c)4km/hr          d) 5 km/hr

2.   If a man rows at the rate of 6 kmph in still water and his rate aginst the current is 4.5 kmph, then

      the man’s rate along the current is

      a) 6 kmph  b)7.5 kmph     c) 6.5kmph      d) 8 kmph       

3.   A boat moves upstream at the rate of 1 km in 20 minutes and down stream 1 km in 12 minutes. The

     speed  of the current is :

     a) 1 kmph b)2 kmph         c)3 kmph         d)2.5 kmph

4.   A man can row  a boat at 10 kmph in still water and  the speed of the stream is 8 kmph. What is the

     time taken to row a distance of 90 km down the stream ?

     a) 8hrs                   b)5 hrs                        c) 15 hrs          d) 20 hrs

5.   If athul  rows 16 km upstream and 24 km down steam  taking 4 hours each, then the speed of the

      stream

          a) 1kmph  2)kmph            3)1.5 kmph      12 kmph

    6. A motorboat, whose speed in 15 km/hr in still water goes 30 km downstream    and comes back in a total of 4 hours 30 minutes. The speed of the stream (in        km/hr) is 

a.2 km/hr

b.3 km/hr 

c.4 km/hr

d.5 km/hr