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1
A train 120 m long is running at a speed of 54 km/h. It takes T1 time to cross the pole and T2 time to cross the 180 m-long platform. What is the difference in time (T2 - T1), in seconds, taken by the train to cross the platform and the pole?
3
A person covered 42 kilometers in 5 hours, using both walking and cycling. Walking speed was 6 km/h, and cycling speed was 10 km/h. What distance did they cover by walking?
4
A man completes a certain journey by a car. If he covered 30% of the distance at the speed of 20 kmph, 60% of the distance at 40 km/h and the remaining of the distance at 10 kmph, his average speed is