Question

a computer shop charges php20 per hour (or a fraction of an hour) for the first two hours and additional php10 per hour for every succeeding hour find how much you would pay if you used one of their computer for 40 minutes​

Answer 1

Given:

According to the question, a computer shop charges php 20 per hour (or a fraction of an hour) for the first two hours and additional php 10 per hour.

To find:

We need to find the charges for using their computer for 40 minutes.

Solution:

Generally, an hour consists of 60 minutes.

So, 40 minutes is $\frac{40}{60}$ hour = $0.667$ hour.

So, the person used computer for 0.667 hour.

Given that, the computer shop charges php 20 per hour (or a fraction of an hour).

Therefore, charges for 40 minutes $=0.667\times20$

                                                          $=13.34$ php

Hence, the computer shop charges php $13.34$ for 40 min.