It was 9.35 AM in Garvita’s watch, which kept
correct time, when Manya informed her that the last
bus left the bus stop at 9.25 am. Manya’s watch is 5
min fast. The frequency of the bus is every 20 min.
For how long Garvita must wait to catch the next
bus?
🎥 Video solution / Text Solution of this question is given below:
Garvita’s time is correct, so current time = 9:35 AM.
Manya’s watch is 5 minutes fast, so 9:25 AM on Manya’s watch means actual time = 9:20 AM.
Buses come every 20 minutes, so next bus after 9:20 AM is at 9:40 AM (actual time).
Waiting time = 9:40 AM − 9:35 AM = 5 minutes.
Answer: 5 minutes