Question

a train reached the destination at speed of 60 km per hour is 40 minutes how much more than required to reach the same destination in 30 minutes​

Answer 1

DISTANCE OF DESTINATION =

DISTANCE =TIME x SPEED

DISTANCE =40 x 60

DISTANCE=2400 METRES

SO SPEED REQUIRED TO TRAVEL 2400 METRES IN 30 MINS IS :-

SPEED = DISTANCE/TIME

SPEED=2400/30

SPEED=80

SO THE SPEED OF TRAIN MUST BE 80 KM/HR TO REACH THE SAME DESTINATION IN 30 MINUTES .