Question
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?
2 m

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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?