The speed of an ordinary train is x km per hour and that of an express train is (x + 25) km per hr.

(i) Find the time taken by each train to cover 300 km.

(ii) If the ordinary train takes 2 hrs more than the express train; calculate the speed of the express train.

A goods train leaves a station at 6 p.m., followed by an express train which leaves at 8 p.m. and travels 20 km/hour faster than the goods train. The express train arrives at a station, 1040 km away, 36 minutes before the goods train. Assuming that speed of both the trains remain constant between the two stations; calculate their speeds.

The difference between digits of a two-digit number is 2 and the product of digits is 24. If tens digit is bigger, the number is :

1. 24

2. 26

3. 46

4. 64

If 18 is added to a two-digit number, its digits are reversed. If the product of the digits of the number is 24, the number is :

1. 46

2. 64

3. 56

4. 48