Question

A train has the speed of 60Km/hr for the first one hour abd40Km/hr for the next half hour its average speed in Km/hr is

Answer 1

AVG speed=60+40/1.5

=100/1.5

=1000/15

=200/3

=66.66km/h

Answer 2

Speed1=s/t

60=s/1

60×1=s

S=60

Speed2=s/t

40=s/0.5

40×0.5=s

20=s

Avg. Speed = total distance /total time

=60+20/1.5

=80/1.5

=53.33km/hr.