The table shows the parking rates at a carpark.
Duration |
Charges |
First 2 hours |
$6.00 |
After the second hour |
$3.20 per 12 hour or part thereof |
Irene paid $28.40 for her parking charges. What was the greatest number of hours she parked her car at the carpark?
Amount that Irene paid for the first 2 hours = $6.00
Amount that Irene paid after the second hour
= 28.40 - 6.00
= $22.40
Number of sets of $3.20
= 22.40 ÷ 3.20
= 7
Duration of the additional time
= 7 x
12 = 3.5 h
Greatest number of hours that Irene parked her car at the carpark
= 2 + 3.5
= 5.5 h
Answer(s): 5.5 h