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Total time taken to cover the whole journey = 200/20 + 150/15 = 10 + 10 = 20 km Desired average speed = 350/20 = 17.5 km/h
A man covered a distance of 240 km in 4 hours on a bike. How much distance will he cover on a bicycle in 8 hours if he rides the bicycle at one-tenth th...
Train P starts from Lucknow to Dehradun at 11:55 am with an average speed of 55 m/s. Train Q starts from Dehradunto Lucknowat 1:35 pm with an average sp...
A boy goes to school at 11 km/Hr and return at a speed of 10 km/hr. If he takes 21 hrs in all. Find the distance from his village to school.
A car running with a speed of 65 km/hr takes 12 hours to go from 'A' to 'B'. If on the way back from 'B' to 'A', the car takes 20% less time than it tak...
When the Ratio of speeds of Aman and vinod is given as 9 : 7 respectively. If Aman gives vinod a start of 60 metres then how far must be the winning Lin...
A superbike takes 84 minutes to cover 112 km. If the speed of the superbike is decreased by 20 km/h, then find the time taken by the superbike to cover ...
If I can walk a certain distance in 25 days when I rest 8 hours a day, how long will it take me to walk twice as far as if I walk twice as fast and res...
A man drove at a steady speed of 48 km/h for 5 hours, and then continued at a constant speed of 40 km/h for the next 4 hours. What is his average speed...
A can walk a certain distance in 11 days when he rests 8 hours a day. How long will he take to walk twice the distance, twice as fast and resting twice ...
A man travelled a total distance of 250 km. He travelled first 100 km on car with a speed of 20 km/h and rest of the distance on bike whose speed is 10 ...