A watch gains 10 s in 5 min was set correct at 9.00 am. When the watch indicated 20 min past 7.00 pm in the same evening, the correct time is.
By BYJU'S Exam Prep
Updated on: September 25th, 2023
- 8:00 pm
- 7:40 pm
- 7:10 pm
- 7:00 pm
A watch that gains 10 seconds in 5 minutes was set correct at 9:00 am. When the watch indicated 20 minutes past 7:00 pm in the same evening, the correct time is 7:00 PM.
Table of content
Answer: 7:00 PM
The watch was set correct at 9:00 am and it gains 10 seconds in 5 minutes.
20 minutes past 7:00 pm means 10 hours and 20 minutes has been passed Or 620 minutes have been passed.
Thus, the watch must have gained 1240 seconds in 620 minutes.
1240 sec = 20 minutes 40 seconds (gained). The correct time should be 7:00 pm.
Summary:
A watch gains 10 s in 5 min was set correct at 9.00 am. When the watch indicated 20 min past 7.00 pm in the same evening, the correct time is.
Out of the given options, 7:00 PM is the correct answer.
