A train takes 1 hour 20 minutes to travel between two stations P and Q. If it travels at of its usual speed, how long will it take to travel between P and Q?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 4 hours 40 minutes.
Time is inversely proportional to speed when distance remains constant.
1 hour 20 minutes = 80 minutes
(New time)/(Original time) = (Original speed)/(New speed)
⇒ New time = 80 × (7/2) = 280 minutes = 4 hours 40 minutes