Question

A train as a speed of 60km/hr for the frist 1 hour and 40km/hr for the next half hour it's average speed is

Answer 1

as average speed is equal to total distance travelled by total time taken

Answer 2

First 1 hour with 60km/h. The distance covered in first hour=60×1=60km

Next half hour with 40km/h, the distance covered=40×1/2=20km

Now,
Average speed = total distance by time taken =
60 +20= 1 +1/2= 53.33