The table shows the parking rates at a carpark.
Duration |
Charges |
First 3 hours |
$10.00 |
After the third hour |
$2.30 per 12 hour or part thereof |
Gillian paid $30.70 for her parking charges. What was the greatest number of hours she parked her car at the carpark?
Amount that Gillian paid for the first 3 hours = $10.00
Amount that Gillian paid after the third hour
= 30.70 - 10.00
= $20.70
Number of sets of $2.30
= 20.70 ÷ 2.30
= 9
Duration of the additional time
= 9 x
12 = 4.5 h
Greatest number of hours that Gillian parked her car at the carpark
= 3 + 4.5
= 7.5 h
Answer(s): 7.5 h