Question

Walking at 5/6 of its usual speed, a train is 10 minutes too late. What is usual time to cover the journey?
A. 70 minutes
B. 2 hours
C. 2/3 hours
D. 5/6 hours
E. 85 minutes

Answer 1

A man is walking at a speed of   5/6

Original speed: New speed = 5: 6

Time taken ratio =  6:5

Actual time = 5x

New time = 6x

The difference between the actual and the new time is 10 minutes

6x – 5x = 10  

x = 10  

Actual time taken is 5x = 5× 10 = 50 minutes

Converting 50 minutes to hours  

To convert minutes into hours, divide by 60

5060=56hours  

∴ The usual time to cover the journey =$\frac56$hours  

Option D is the correct answer.