The table shows the parking rates at a carpark.
Duration |
Charges |
First 4 hours |
$9.00 |
After the fourth hour |
$2.30 per 12 hour or part thereof |
Diana paid $20.50 for her parking charges. What was the greatest number of hours she parked her car at the carpark?
Amount that Diana paid for the first 4 hours = $9.00
Amount that Diana paid after the fourth hour
= 20.50 - 9.00
= $11.50
Number of sets of $2.30
= 11.50 ÷ 2.30
= 5
Duration of the additional time
= 5 x
12 = 2.5 h
Greatest number of hours that Diana parked her car at the carpark
= 4 + 2.5
= 6.5 h
Answer(s): 6.5 h