Question

Laila purchased a prepaid phone card for $25 . Long distance calls cost 24 cents a minute using this card. Laila used her card only once to make a long distance call. If the remaining credit on her card is $13.72 , how many minutes did her call last?

Answer 1

The call lasted for 47 minutes.

Explanation:

It is given that:

Value of prepaid card = $25

Cost per minute of long distance call = 24 cents = $0.24

Remaining credit = $13.72

Let,

x be the number of minutes

y be the remaining amount

y = 25 - 0.24x

13.72 = 25 - 0.24x

0.24x = 25 - 13.72

0.24x = 11.28

Dividing both sides by 0.24

`(0.24x)/(0.24)=(11.28)/(0.24)\\x=47`

Therefore,

The call lasted for 47 minutes.