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30 June, 22:14

An emergency plumber charges $65 as a call-out fee plus an additional $75 per hour. He arrives at a house at 9:30 am and works to repair a water tank. If the total repair bill is $195.25 at what time was the repair completed?

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  1. 30 June, 22:48
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    Around 11:15 am

    Step-by-step explanation:

    Let h represents the number of hours the plumber works

    Since the plumber charges $65 fee plus $75 per hour, the bill can be calculated by:

    → bill = 65 + 75h

    Since the bill is $195.25

    → 195.25 = 65 + 75h

    → 75h = 130.25

    → h = 1.74

    1.74 implies that the plumber worked almost 1 hour and 45 minutes. Since the plumber started at 9:30, the repair was completed around 11:15 am.
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