The table shows the parking rates at a carpark.
Duration |
Charges |
First 2 hours |
$3.00 |
After the second hour |
$3.20 per 12 hour or part thereof |
Sarah paid $31.80 for her parking charges. What was the greatest number of hours she parked her car at the carpark?
Amount that Sarah paid for the first 2 hours = $3.00
Amount that Sarah paid after the second hour
= 31.80 - 3.00
= $28.80
Number of sets of $3.20
= 28.80 ÷ 3.20
= 9
Duration of the additional time
= 9 x
12 = 4.5 h
Greatest number of hours that Sarah parked her car at the carpark
= 2 + 4.5
= 6.5 h
Answer(s): 6.5 h