The table shows the parking rates at a carpark.
Duration |
Charges |
First 3 hours |
$4.00 |
After the third hour |
$1.90 per 12 hour or part thereof |
Olivia paid $21.10 for her parking charges. What was the greatest number of hours she parked her car at the carpark?
Amount that Olivia paid for the first 3 hours = $4.00
Amount that Olivia paid after the third hour
= 21.10 - 4.00
= $17.10
Number of sets of $1.90
= 17.10 ÷ 1.90
= 9
Duration of the additional time
= 9 x
12 = 4.5 h
Greatest number of hours that Olivia parked her car at the carpark
= 3 + 4.5
= 7.5 h
Answer(s): 7.5 h