Question

maximum speed of a train is 90 km per hour it take 10 hour to cover a distance of 5 km find the ratio of its average speed to maximum speed

Answer 1

Acccording to the Ques.

we can use the formula of Average Speed
i.e. Average Speed = $\frac{Total Distance}{Total Time}$
= 5/10 = 0.5 km/hr 

Therefore , ratio of average speed to maximum speed = 90/0.5
= 180:1 


HOPE THIS HELPS!!

Answer 2

distance covered by tain in 10 hours is 5 km so distance covers in 180 hours is 90 km
so ratio is 180:1