Question

A train travels at a speed of 60km /h for 0.52h .at 30km/hfor next 0.24h mad then at 70km/h for next 0.71.what is the average speed of the train

Answer 1

distance =speed *time

d1=60*0.52=31.2km/h

d2=30*0.24=7.2km/h

d3=70*0.71=49.7km/h

average speed=total distance/total time

=d1+d2+d3/t1+t2+t3

=31.2+7.2+49.7

0.52+0.24+0.71

=88.1

1.47

=59.93km/h