1) A man swimming upstream takes 6 hours to cover a certain distance, while it takes 4 hours to cover the same distance swimming downstream. What is the ratio between the speed of the man and speed of the stream respectively?

2) A car runs at the speed of 40 km/hr when not serviced and runs at 65 km/hr when serviced. After servicing, the car covers a certain distance in 5 hr. How much approximate time will the car take to cover the same distance when not serviced?

3) train leaves Rampur at 2:15 pm and travels at the rate of 50 kmph. Another train leaves Rajrupur for Rampur at 1:35 pm and travels at the rate of 60 kmph. If the distance between Rajrupur and Rampur is 590 km at what distance from Rampur will the two trains meet?

4) A man bought a tonga and a horse for Rs 7500. He sold the tonga at 11% profit and the horse at 26% profit, making 19% profit on the whole. Find the cost price of the tonga and the horse separately.

5) Find the number of ways in which 8 different flowers can be strung to form a garland so that 4 particular flowers are never separated.

6)A train travels at the rate of 50 km/hr without stoppages and it travels at 40 km/hr with stoppages. How many minutes does the train stop on an average per hour?