Math Question with Answer

1.       Kim has two telephones.  One is cellular and the other is a landline.  The rates for local calls are shown in the table below.

Rates                                           Cellular                                Landline

Monthly Rental Fee                        $0                           $45

Charges per minute                        85 cents               15 cents

Question 1 – In one month, calls were made lasting for a total of 1 hour and 5 minutes.  Show by calculations, that the cost for using the landline telephone was less than the cost for using the cellular telephone.

Question 2 – For the month of March, the landline telephone was used, and the bill was $54.60.  Calculate the total time, in minutes, for which the calls lasted.   (Total 11 marks)

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Question 1 – In one month, calls were made lasting for a total of 1 hour and 5 minutes.  Show by calculations, that the cost for using the landline telephone was less than the cost for using the cellular telephone.

ANSWER 1 –

1h, 5m = 65 minutes

 Landline: 65 minutes x .15 cents per/m = $9.75 + $45 rental = $ 54.75

Cellular: 65 minutes x .85 cents per/m = $55

Therefore, Landline is less than cellular

 Question 2 – For the month of March, the landline telephone was used, and the bill was $54.60.  Calculate the total time, in minutes, for which the calls lasted

Answer 2 –

$54.60 - $45 = $9.60

9.60 / .15 = 64 minutes