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# How much did a certain telephone call cost? (1)The call lasted 53 min

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Math Expert
Joined: 02 Sep 2009
Posts: 58142
How much did a certain telephone call cost? (1)The call lasted 53 min  [#permalink]

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23 Sep 2018, 21:43
00:00

Difficulty:

5% (low)

Question Stats:

93% (00:37) correct 7% (00:32) wrong based on 62 sessions

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How much did a certain telephone call cost?

(1) The call lasted 53 minutes.

(2) The cost for the first 3 minutes was 5 times the cost for each additional minute.

_________________
CEO
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2972
Location: India
GMAT: INSIGHT
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Re: How much did a certain telephone call cost? (1)The call lasted 53 min  [#permalink]

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24 Sep 2018, 04:52
1
Bunuel wrote:
How much did a certain telephone call cost?

(1) The call lasted 53 minutes.

(2) The cost for the first 3 minutes was 5 times the cost for each additional minute.

Question: How much did a certain telephone call cost?

Statement 1: The call lasted 53 minutes.

Tariff of call (i.e. charge per min of call) is unknown hence

NOT SUFFICIENT

Statement 2: The cost for the first 3 minutes was 5 times the cost for each additional minute.

Tariff of call (i.e. charge per min of call) is unknown along with the duration hence

NOT SUFFICIENT

Combining the two statements

Tariff of call (i.e. charge in dollar or cents per min of call) is unknown along with the duration hence

NOT SUFFICIENT

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##### General Discussion
SVP
Joined: 26 Mar 2013
Posts: 2326
Re: How much did a certain telephone call cost? (1)The call lasted 53 min  [#permalink]

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24 Sep 2018, 07:41
GMATinsight wrote:
Bunuel wrote:
How much did a certain telephone call cost?

(1) The call lasted 53 minutes.

(2) The cost for the first 3 minutes was 5 times the cost for each additional minute.

Question: How much did a certain telephone call cost?

Statement 1: The call lasted 53 minutes.

Tariff of call (i.e. charge per min of call) is unknown hence

NOT SUFFICIENT

Statement 2: The cost for the first 3 minutes was 5 times the cost for each additional minute.

Tariff of call (i.e. charge per min of call) is unknown along with the duration hence

NOT SUFFICIENT

Combining the two statements

Tariff of call (i.e. charge in dollar or cents per min of call) is unknown along with the duration hence

NOT SUFFICIENT

Dear GMATinsight

Can you please help me interpret statement 2 in math equation? How to build the relation between the 3 minutes cost and cost of additional minute?

CEO
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2972
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Re: How much did a certain telephone call cost? (1)The call lasted 53 min  [#permalink]

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24 Sep 2018, 07:53
Mo2men wrote:
GMATinsight wrote:
Bunuel wrote:
How much did a certain telephone call cost?

(1) The call lasted 53 minutes.

(2) The cost for the first 3 minutes was 5 times the cost for each additional minute.

Question: How much did a certain telephone call cost?

Statement 1: The call lasted 53 minutes.

Tariff of call (i.e. charge per min of call) is unknown hence

NOT SUFFICIENT

Statement 2: The cost for the first 3 minutes was 5 times the cost for each additional minute.

Tariff of call (i.e. charge per min of call) is unknown along with the duration hence

NOT SUFFICIENT

Combining the two statements

Tariff of call (i.e. charge in dollar or cents per min of call) is unknown along with the duration hence

NOT SUFFICIENT

Dear GMATinsight

Can you please help me interpret statement 2 in math equation? How to build the relation between the 3 minutes cost and cost of additional minute?

Mo2men
That only means that
If cost of 4th Min on call = a
then cost of first 3 minutes = 5a
i.e. cost of 5 min call will be (5a) + a + a = 7a

I hope it helps!
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GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION
Re: How much did a certain telephone call cost? (1)The call lasted 53 min   [#permalink] 24 Sep 2018, 07:53
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# How much did a certain telephone call cost? (1)The call lasted 53 min

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