Question

train travels at 60 km per hour for 0.52 hour at 30 kilometre per hour for the next 0.24 hour and at 70 km per hour for the next 0.71 hour. what is the average speed of the train ?​

Answer 1

We know, distance= speed × time.

So, for first 0.52h, distance,

d1=60x0.52=31.2km

For next 0.24h, distance,

d2=60x0.24=7.2km

For last 0.71 h, distances,

d3=60x0.71=49.7km

Average speed = total distance covered/total time taken

Avg speed =

$31.2 + 7.2 + 49.7 \div 0.52 + 0.25 + 0.71 = 59.53$

= 59.53km/h