The table shows the parking rates at a carpark.
Duration |
Charges |
First 3 hours |
$5.00 |
After the third hour |
$3.10 per 12 hour or part thereof |
Penelope paid $32.90 for her parking charges. What was the greatest number of hours she parked her car at the carpark?
Amount that Penelope paid for the first 3 hours = $5.00
Amount that Penelope paid after the third hour
= 32.90 - 5.00
= $27.90
Number of sets of $3.10
= 27.90 ÷ 3.10
= 9
Duration of the additional time
= 9 x
12 = 4.5 h
Greatest number of hours that Penelope parked her car at the carpark
= 3 + 4.5
= 7.5 h
Answer(s): 7.5 h