The charging standard of a taxi is: the starting price is 7 yuan (i.e. the driving distance is no more than 3km, you have to pay 7 yuan). After 3km, for every 1km increase, 2.4 yuan will be charged The charging standard of a taxi is: the starting price is 7 yuan (i.e. the driving distance is not more than 3km, you need to pay 7 yuan). After more than 3km, for every additional 1km, you will be charged 2.4 yuan (less than 1km is counted as 1km). If someone takes this kind of taxi and pays 19 yuan in total from place a to place B, what is the maximum distance from place a to place B?

(19-7)÷2.4+3
=5+3
=8km
A: the maximum distance from a to B is 8km
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