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The charge for a telephone call between City R and City S is

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seabhi
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The charge for a telephone call between City R and City S is [#permalink] The charge for a telephone call between City R and City S is   Updated on: 24 Feb 2014, 06:46
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The charge for a telephone call between City R and City S is $0.42 for each of the first 3 minutes and $0.18 for each additional minute. A certain call between these two cities lasted for x minutes, where x is an integer. How many minutes long was the call?

(1) The charge for the first 3 minutes of the call was $0.36 less than the charge for the remainder of the call.

(2) The total charge for the call was $2.88.
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D

Originally posted by seabhi on 24 Feb 2014, 05:42.
Last edited by Bunuel on 24 Feb 2014, 06:46, edited 1 time in total.
Edited the question.
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Re: The charge for a telephone call between City R and City S is [#permalink] The charge for a telephone call between City R and City S is   24 Feb 2014, 06:53
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The charge for a telephone call between City R and City S is $0.42 for each of the first 3 minutes and $0.18 for each additional minute. A certain call between these two cities lasted for x minutes, where x is an integer. How many minutes long was the call?

Say the call was x minutes long.

(1) The charge for the first 3 minutes of the call was $0.36 less than the charge for the remainder of the call --> $0.42*3 + 0.36 = $0.18*(x-3) --> we can find x. Sufficient.

(2) The total charge for the call was $2.88 --> $0.42*3 + $0.18*(x-3) = $2.88 --> we can find x. Sufficient.

Answer: D.

Hope it's clear.
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Re: The charge for a telephone call between City R and City S is [#permalink] The charge for a telephone call between City R and City S is   18 May 2014, 10:21
The Charge for a telephone call between City R and City S is $0.42 for each of the first 3 minutes and $0.18 for each additional minutes. A certain call between these two cities lasted for x minutes, where x is an integer. How many minutes long was the call?

(1) the charge for the first 3 minutes of the call was $0.36 less than the charge for the reminder of the call.
3*0.42=0.18*y-0.36 ( y is the number of minute for the remainder call) we can find the value of y and then y+3 ( the first minutes called) sufficient

(2) The total charge for the call was $2.88
3*0.42+0.18*z=2.88 we also can find z and z+3= the number of minutes the call last. sufficient
Hence D
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Re: The charge for a telephone call between City R and City S is [#permalink] The charge for a telephone call between City R and City S is   19 Oct 2016, 05:48
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We are given that the charge for a telephone call between City R and City S is $0.42 for each of the first 3 minutes and $0.18 for each additional minute. We are also given that a call between the two cities lasted for x minutes. We can create the following equation:

3(0.42) + 0.18(x - 3) = total cost of the call

1.26 + 0.18x - 0.54 = total cost of the call

0.18x + 0.72 = total cost of the call

We must determine the value of x.

Statement One Alone

The charge for the first 3 minutes of the call was $0.36 less than the charge for the remainder of the call.

Using the information in statement one, and from the given information, we can create the following equation:

1.26 = (0.18x - 0.54) - 0.36

0.78 = 0.18x - 0.54

2.16 = 0.18x

x = 12

Statement one alone is sufficient to answer the question. We can eliminate answer choices B, C, and E.

Statement Two Alone

The total charge for the call was 2.88.

Using the information in statement two, and from the given information, we can create the following equation:

0.18x + 0.72 = $2.88

0.18x = $2.16

x = 12

Answer: D
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Re: The charge for a telephone call between City R and City S is [#permalink] The charge for a telephone call between City R and City S is   21 Feb 2022, 14:47
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Re: The charge for a telephone call between City R and City S is [#permalink]
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