The table shows the parking rates at a carpark.
Duration |
Charges |
First 3 hours |
$9.00 |
After the third hour |
$1.40 per 12 hour or part thereof |
Tammy paid $24.40 for her parking charges. What was the greatest number of hours she parked her car at the carpark?
Amount that Tammy paid for the first 3 hours = $9.00
Amount that Tammy paid after the third hour
= 24.40 - 9.00
= $15.40
Number of sets of $1.40
= 15.40 ÷ 1.40
= 11
Duration of the additional time
= 11 x
12 = 5.5 h
Greatest number of hours that Tammy parked her car at the carpark
= 3 + 5.5
= 8.5 h
Answer(s): 8.5 h