The table shows the parking rates at a carpark.
Duration |
Charges |
First 3 hours |
$6.00 |
After the third hour |
$2.30 per 12 hour or part thereof |
Mary paid $24.40 for her parking charges. What was the greatest number of hours she parked her car at the carpark?
Amount that Mary paid for the first 3 hours = $6.00
Amount that Mary paid after the third hour
= 24.40 - 6.00
= $18.40
Number of sets of $2.30
= 18.40 ÷ 2.30
= 8
Duration of the additional time
= 8 x
12 = 4 h
Greatest number of hours that Mary parked her car at the carpark
= 3 + 4
= 7 h
Answer(s): 7 h