If Ram covers a certain journey at 60% of his usual speed, he reaches the destination late by 36 min. His usual time (in min) to reach the destination is:

54

Let initial speed = 10

New speed = 60% of 10 = 6

As , Distance = Speed × Time

Speed and Time have indirect relationship  .

Ratio             Original    :   New

Speed                10       :    6

Time                    6       :    10

According to question ,

4R = 36 min

1R = 9 min

Usual time = 6R = 6 × 9 = 54 min