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 |
Abi paid $27.70 for her parking charges. What was the greatest number of hours she parked her car at the carpark?
Amount that Abi paid for the first 3 hours = $9.00
Amount that Abi paid after the third hour
= 27.70 - 9.00
= $18.70
Number of sets of $1.70
= 18.70 ÷ 1.70
= 11
Duration of the additional time
= 11 x
12 = 5.5 h
Greatest number of hours that Abi parked her car at the carpark
= 3 + 5.5
= 8.5 h
Answer(s): 8.5 h