Answer :

Final answer:

A watch gaining 18 seconds per day will gain a total of 6.3 minutes over the span of 3 weeks.

Explanation:

The question asks how much time a watch that gains 18 seconds per day will gain over a period of 3 weeks. To solve this, we need to perform a few simple calculations.

First, we calculate the total seconds gained in one day:

18 seconds/day

Next, we find out the total number of days in 3 weeks:

3 weeks x 7 days/week = 21 days

Then, we multiply the number of seconds gained in a day by the total number of days:

18 seconds/day x 21 days = 378 seconds

Last, we convert the seconds into minutes:

378 seconds ÷ 60 seconds/minute = 6.3 minutes

The watch will gain a total of 6.3 minutes in 3 weeks.

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Rewritten by : Barada