Question

a plane left 30 minutes late than its scheduled time and in order to reach the destination 1500 km away its time .it had to increase its speed by 100 km /h from the usual speed.find the usual speed.

Answer 1

plane left 30 minutes late than the schedule time and in order ... Let the usual time taken by the aeroplane = x km/hr ... and the usual speed = (1500 / 3) = 500km/hr.