Speed of the motorboat upstream = 56/(7/4) = 32 km/hr Let the speed of the current be x km/hr ⇒ 40 – x = 32 ⇒ x = 8 km/hr Speed of motor boat downstream = 40 + 8 = 48 km/hr Time taken to cover 56 km at 48 km/hr = 56/48 = 1 hour 10 minutes
Two trains A and B, were proceeding in the same direction on parallel tracks at 20 km/hr and 74 km/hr respectively. A man noticed that it took exactly 1...
A goods train leaves a station at a certain time and at a fixed speed. After 10 hours, an express train leaves the same station and moves in the same di...
A train running with a speed of 45 km/hr can cross a pole in 10 seconds and a platform in 20 seconds. Find the length of the platform.
Two trains running in a opposite directions crosses pole in 84s and 57s respectively and they cross each other in 72s. Find the ratio of their speeds?
Two cars start from a place with a speed of 45 km/hr at an interval of 10 minutes. What is the speed of a man coming from the opposite direction towards...
A train started from station P and preceded towards station Q at a speed of 72 km/h. 45 minutes later, another train started from station Q and preceded...
Two cars start from a place with a speed of 50 km/hr at an interval of 12 minutes. What is the speed of a man coming from the opposite direction towards...
Train A. running at the speed of 80 km/hr crossed train B. running at the speed of 70 km/hr in the opposite direction. Both trains finish crossing each...
A 130 m long train crosses another 250 m long train running in the opposite direction in 10 seconds. If the shorter train crosses a pole in 10 seconds, ...
Train ‘A’ running with a speed of 19.8 km/hr can cross a standing goods train of 4 times its length in 40 seconds. Find the time taken by 250 metres...
