Here are some solved  Time and speed problems from TCS.

1) A boat can travel with a speed of 13 kmph in still water. if the speed of stream is 4 kmph,find the time taken by the boat to go 68 km downstream?

a) 4
b) 6
c) 8

Answer is 4

2) A boat takes 90 min less to travel 36 miles downstream then to travel the same distence upstream. if the speed of the boat in still water is 10 mph . The speed of the stream is :

a) 4
b) 2
c) 8

Answer is 2

3) There is a road beside a river. two friends started from a place A, moved to a temple situated at another place B and then returned to A again. one of them moves on a cycle at a speed of 12 kmph, while the other sails on a boat at a speed of 10 kmph . if the river flows at the speedof 4 kmph , which of the two friends will return to place A first ?

a) Cyclist
b) Motorist

Answer is Cyclist

4) There is a road beside a river. two friends started from a place A, moved to a temple situated at another place B and then returned to A again. one of them moves on a cycle at a speed of 12 kmph, while the other sails on a boat at a speed of 10 kmph . if the river flows at the speedof 4 kmph , which of the two friends will return to place A first ? A boat takes 19 hrs 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 sream is 4 kmph and the speed of the boat in still
water is 14 kmph. what is the distence between A and B?

a) 180
b) 220
c) 200

Answer is 180