Question

Two buses start at the same time from delhi and agra, which are 300 km. Apart, towards each other. After what time will they cross each other if their speeds are 38 km per hour and 37 km per hour?

Answer 1

distance reduce in 1 hour is (37+38) km=75 km
now 1 meter distance will be reduced in 1/75 hour
therefore 300 km distance will be reduced in (1/75)×300 hour=4 hour
therefore the required time is 4 hour.