Question

An express train travelled at an average speed of 100 km/hr, stopping for 3 minutes after every 75 km. how long did it take to reach its destination 600 km from the starting point?

Answer 1

Speed =100km/hr
Time taken in covering 75km =75/100 =3/4
45 min
Then 3 minutes stopping total time =45+3=48
In 75 km
To cover =600

Total time taken =600/75x48 =8x48=384min
=6.4hr 6 hr 6/15 min

Answer 2

Given,
Speed = 100km/hr

Therefore time taken to cover 75km= 75/100=3/4hr


So 3/4 ×60= 15×3= 45 mins

But the train stops for 3 mins after every 75km.
Therefore = 45+3= 48 mins in 75km.


To cover =600km
Total time = 600/75 ×48
= 8×48
=384 min
384/60
=6.4 hrs


It took 6.4 hrs to reach it's destination 600 km from starting point.