The table shows how much a company charges for a aircon servicing job. Mrs Chiam paid the company $420 for a aircon servicing job. How many hours of aircon servicing did she pay for?
Charges | |
First 3 hours | $170 |
Every additional hour | $50 |
Charges | |
First 3 hours | $170 |
Every additional hour | $50 |
Charges | |
First 3 hours | $170 |
Every additional hour | $50 |
Charges | |
First 3 hours | $170 |
Every additional hour | $50 |
Charges | |
First 3 hours | $170 |
Every additional hour | $50 |