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21 April, 07:56

Thirty students volunteered to set up booths for the school fair. All of the students worked 2 hours after school on Thursday and on Friday. Twelve of them also worked 3 hours on Wednesday. If they did this for 2 weeks how many total hours were worked?

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  1. 21 April, 09:52
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    Step-by-step explanation:

    30 students volunteered to set up booths for the school fair. All of the students worked 2 hours after school on Thursday and on Friday. This means the total number of hour worked on Thursday is 30 * 2 = 60 hours and Friday is 30 * 2 = 60 hours

    Twelve of them also worked 3 hours on Wednesday. It means that the total number of hour worked on Wednesday is

    12 * 3 = 36 hours

    If they did this for 2 weeks, it means that they worked for 2 Wednesdays, 2 Thursdays and 2 Fridays.

    Total number of hours worked will be

    2*60 + 2*60 + 2*36 = 120 + 120 + 72 = 312 hours
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