A pay phone service charges Php 5 for the first three minutes and Php 1 for every minute additional or a fraction thereof. How much will a caller have to pay if his call lasts for 8 minutes?

Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter21: Direct And Inverse Proportions
Section: Chapter Questions
Problem 4A
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A pay phone service charges Php 5 for the first three minutes and Php 1 for every minute additional or
a fraction thereof. How much will a caller have to pay if his call lasts for 8 minutes?
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