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# Keep Cool Air-Conditioning charges \$ 60 for the first 30 min

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Keep Cool Air-Conditioning charges \$ 60 for the first 30 min [#permalink]  29 Jul 2020, 10:35
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100% (01:04) correct 0% (00:00) wrong based on 6 sessions
Keep Cool Air-Conditioning charges \$ 60 for the first 30 minutes of every house call and \$ 15 for each additional quarter hour. In addition, the customer has to pay for any required parts needed for repairs. If Mrs. Lewis’s bill was \$ 225, which included \$ 90 for parts, how long did the air-conditioning repair technician work?

A. 1 hour and 15 minutes

B. 1 hour and 45 minutes

C. 2 hours

D. 2 hours and 15 minutes

E. 3 hours

Kudos for the right answer and explanation
[Reveal] Spoiler: OA

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Joined: 02 May 2020
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Re: Keep Cool Air-Conditioning charges \$ 60 for the first 30 min [#permalink]  29 Jul 2020, 10:57
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If we remove \$90 for parts and \$60 for first 30 minutes,
Mrs. Lewis has paid 225 - 90 - 60 = \$75 for additional quarters.
Since, each additional quarter cost him \$15, no. of additional quarter = 75/15 = 5
=> time in minutes = 30 + 5*15 = 105 minutes or 1 hour 45 minutes.

Re: Keep Cool Air-Conditioning charges \$ 60 for the first 30 min   [#permalink] 29 Jul 2020, 10:57
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