A plane left 30 minutes later than the scheduled time and in order to reach its destination 1500 km away in time it has to increase its speed by 250 km/h from its usual speed. The usual speed is

In a flight of 2800 km, an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 100 km/hr and time of flight increased by 30 minutes. What was the original avera…

If I walk with a speed of 5 km per hour from my house to the station, my train would have left the station 7 minutes before my arrival. But, if I walk with a speed of 6 km per hour, I will reach the…

Travelling at 3/5th of his usual speed, a man is late by 20 minutes. What is the usual time of the travel with his usual speed?

A man walks at an average speed of 3 km/hr from his home and reaches office 40 minutes early. If he walks at an average speed of 2 km/hr, he would reach office 40 minutes late. What is the distance b…

The distance between Delhi and Agra is 200 km. Suppose you are travelling from Delhi to Agra by a car. If you can maintain an average speed of 90 km/hr for 120 km and 40 km/hr for the remaining dista…