Diane purchased a prepaid phone card for $20. Long distance calls cost 19 cents a minute using this card, Diane used her card only once to make a long distance call. If the remaining credit on her card is $17.34, how many minutes did her call last?

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Diane purchased a prepaid phone card for $20. Long distance calls cost 19 cents a minute using this card, Diane used her card only once to make a long distance call. If the remaining credit on her card is $17.34, how many minutes did her call last?

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Answer 1 · 2017-05-02T11:53:04

Exactly 14 minutes and zero seconds.

Explanation:

Since she used $$ 2.66$ $$2.66$ for her only call and since one call costs $$ 0.19$ $$0.19$ per minute, you can compute number of minutes she spent for her last (and only) call.

Let me start how we compute $$ 2.66$ $$2.66$ first. $$ 20 - $ 17.34 = $ 2.66$ $$20-$17.34=$2.66$

Now find duration of her call: $\frac{$ 2.66}{$ 0.19} = 14$ $($2.66)/($0.19)=14$ minutes.

I think it is a long call. Really long one indeed.

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Diane purchased a prepaid phone card for $20. Long distance calls cost 19 cents a minute using this card, Diane used her card only once to make a long distance call. If the remaining credit on her card is $17.34, how many minutes did her call last?

1 Answer

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