A pilot flies an aircraft at a certain speed for a distance of 800 km. He could have saved 40 min by increasing the average speed of the plane by 40 km/h. Find the average speed of the aircraft.

A 300-meter long train crosses a platform in 39 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform

A train crosses a platform of 150 m in 15 sec, the same train crosses another platform of length 250 m in 20 sec. then find the length of the train?

Two trains are running in opposite directions in the same speed. The length of each train is $120$ metre. If they cross each other in $12$ seconds, the speed of each train (in km/hr) is

A train takes 10 sec to pass a signal post and covers a distance of 10 km in 15 min. Find the length of the train?

A train is 360 meter long is running at a speed of 45 km/hour. In what time will it pass a bridge of 140 meter length?

A train, 800 meters long is running with a speed of 78 km/hr. It crosses a tunnel in 1 minute. What is the length of the tunnel?

A goods train runs at the speed of 72 kmph and crosses a 250 m long platform in 26 seconds. What is the length of the goods train?

Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is: