Maximum burning time of a candle

Middle school · ●○○○○ 10 pts

A candle with an original length of

12\ \text{cm}

burns so that its remaining length depends on the burning time as shown in the table below: | Burning time (minutes) |

10

20

30

40

50

\ldots

| |---|---|---|---|---|---|---| | Remaining length (cm) |

11.2

10.4

9.6

8.8

8

\ldots

| Assuming the remaining length decreases linearly with burning time, find the maximum number of minutes the candle can burn.