A bus for Delhi leaves every 30 minutes from a bus stand. An enquiry clerk, Ramesh told Anil, a passenger that the bus has already left 10 minutes ago and next bus will leave at 9:35 am. At what time did the enquiry clerk give this information to Anil?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 9:15 am
The buses leave every 30 minutes, so the bus that has just left went 30 minutes before the next one. The clerk spoke 10 minutes after that bus left.
Next bus: 9:35 am, so the last bus left at 9:35 − 30 min \(=\) 9:05 am
That bus had left 10 minutes before the clerk spoke: 9:05 + 10 min \(=\) 9:15 am