A train is going at 1/2 of its usual speed and it takes an extra 60 minutes to reach its destination. Find its usual time to cover the same distance.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 1 hour.
Given:
A train is going at 1/2 of its usual speed and it takes an extra 60 minutes to reach its destination
Concept used:
When distance is constant, speed is inversely proportional to the time taken
Calculations:
Let the speed of train be 2s
reduced speed = 2s/2 = s
Ratio = Speed before : Speed after = 2s : s
Time ratio = 1 : 2
According to the question,
⇒ 2s - s = 60
⇒ s = 60 mins or 1 hour