**6****) A ****train ****of ****300 m is ****travelling ****with the speed ****of ****45 km/h when it passes point A completely. At the same time, a motorbike starts from point A with the speed of 70 km/h. When it exactly reaches the middle point of the train, the train increases its speed to 60 km/h and motorbike reduces its speed to 65 ****kmph****. How much distance will the motorbike travel while ****passing ****the train completely? ****
**(a) 2.52 km (c) 2.37 km (b) 2 km (d) 3.56 km (e)None Of these

**1) A person can row a distance of one km upstream in 10 ****mins**** and downstream in four ****mins****. What is the speed of the stream?
**(a) 9 kmph (b) 4.5 kmph (c) 4 kmph (d) 5 kmph (e) 5.6 kmph

**2) A man can row half a km against the current in 12 min and returns in 6 min. Find the speed of the current?
**(a) 2.5 kmph (b) 3 kmph (c) 1.5 kmph (d) 1.25 kmph (e) None of these

**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) 2.5 kmph (b) 3 kmph (c) 1.5 kmph (d) 1.25 kmph (e) None of these

**4) A man’s speed with the current is 15 km/hr. and the speed of the current is 2.5 km/hr. Find the man’s speed against the current.
**(a) 12 kmph (b) 10 kmph (c) 20 kmph (d) 15 kmph (e) None of these

**5****) A swimmer swims from a point against a current for 5 minutes and then swims backwards in favor of the current for next 5 minutes and comes to the Point B. If AB is 100 ****metres****, the speed of the current (in km per hour) is:
**(a) 0.8 kmph (b) 0.5 kmph (c) 0.6 kmph (d) 1.5 kmph (e) None of these

**6) A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?
**(a) 3 : 8 (b) 8 : 3 (c) 5 : 3 (d) 6 : 1 (e) None of these