A man swimming in a stream which flows `1 1/2\ km//hr` finds that in a given time he can swim twice as far with the stream as he can against it. At what rate does he swim? a. `4 1/2\ km//hr` b. `5 1/2\ km//hr` c. `7 1/2\ km//hr` d. none of these

A man swimming in a stream which flows 1(1)/(2)backslash km/hr finds that in a given time he can swim twice as far with the stream as he can against it.At what rate does he swim? a.4(1)/(2)backslash km/hr b.5(1)/(2)backslash km/hrc.7(1)/(2)backslash km/hrd . none of these

A man rows to a place 48 km distant and come back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is:

A fisherman can row 2km against the stream in 20 minutes and return in 15 minutes. The speed of current is ? Options are (a) 1 km/hr (b) 2 km/hr (c) 3 km/hr (d) None of the above.

If a boat goes 7 km upstream in 42 minutes and the speed of the stream is 3 kmph, then the speed of the boat in still water is: a. 4. 2 km//hr b. 9 km//hr c. 13 km//hr d. 21 km//hr

A man rows down a river 15 km in 3 hrs. with the stream and returns in 7 1/2 hrs, The rate at which he rows in still water is