Question
Thermal efficiency of diesel engine varies between
Solution
A diesel engine can convert 32% to 38% of the energy in the fuel into useful mechanical work, while the remaining energy is lost as waste heat.
Ramesh covered 300 km in total — part of the journey was by auto at 60 km/h, and the rest by walking at 6 km/h. If total time was 9.5 hours, what dist...
A biker travels at a speed of 23 km/hr for 7 hours each day on all days except Sunday. If his journey starts on a Wednesday, on which day will he reach ...
A train travels from Station A to Station B at a speed of 60 km/h and returns from Station B to Station A at a speed of 40 km/h. If the distance between...
A train travels from station ‘P’ to station ‘Q’ at a constant speed. If its speed was increased by 20 km/h, it would have taken 1 hour less to c...
Ram makes four trips of equal distances. His speed on first trip was 120 km/hr and in each subsequent trip his speed was half of the previous trip. What...
A thief snatched a lady's purse and began running north towards a bus that was 200 meters away. A policeman, who was standing 40 meters south of the lad...
Identify the cases where two objects moving in opposite directions have a relative speed of 30 km/h.
- A person completes a journey in 300 minutes by train at a speed of 60 km/h. What should be his speed by bus to cover the same distance in 7 hours?
A,B and C run around a Circular track starting from the same point simultaneously and in the same direction at the speed of 8 kmph, 12 kmph and 16 kmph ...
- Bus 'X' and Bus 'Y' start together from a station heading in the same direction. Bus 'X' moves at 18 km/h while Bus 'Y' moves at 30 km/h. Determine the dis...
