The table shows the parking rates at a carpark.
Duration |
Charges |
First 4 hours |
$3.00 |
After the fourth hour |
$1.90 per 12 hour or part thereof |
Olivia paid $31.50 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 4 hours = $3.00
Amount that Olivia paid after the fourth hour
= 31.50 - 3.00
= $28.50
Number of sets of $1.90
= 28.50 ÷ 1.90
= 15
Duration of the additional time
= 15 x
12 = 7.5 h
Greatest number of hours that Olivia parked her car at the carpark
= 4 + 7.5
= 11.5 h
Answer(s): 11.5 h