The table shows the parking rates at a carpark.
Duration |
Charges |
First 2 hours |
$10.00 |
After the second hour |
$2.80 per 12 hour or part thereof |
Usha paid $21.20 for her parking charges. What was the greatest number of hours she parked her car at the carpark?
Amount that Usha paid for the first 2 hours = $10.00
Amount that Usha paid after the second hour
= 21.20 - 10.00
= $11.20
Number of sets of $2.80
= 11.20 ÷ 2.80
= 4
Duration of the additional time
= 4 x
12 = 2 h
Greatest number of hours that Usha parked her car at the carpark
= 2 + 2
= 4 h
Answer(s): 4 h