The table shows the parking rates at a carpark.
Duration |
Charges |
First 3 hours |
$9.00 |
After the third hour |
$1.70 per 12 hour or part thereof |
Penelope paid $19.20 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 = $9.00
Amount that Penelope paid after the third hour
= 19.20 - 9.00
= $10.20
Number of sets of $1.70
= 10.20 ÷ 1.70
= 6
Duration of the additional time
= 6 x
12 = 3 h
Greatest number of hours that Penelope parked her car at the carpark
= 3 + 3
= 6 h
Answer(s): 6 h