# 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

1. 8:00 pm
2. 7:40 pm
3. 7:10 pm
4. 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.

## 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.

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