In order to enhance citizens' awareness of saving and make rational use of natural gas resources, a city has adjusted the price of urban civil pipeline natural gas since June 65438+ 10/day, and implemented a step-by-step gas price. The adjusted charge price is shown in the following table:

1 If the gas consumption of user A in March is 60m^3, it shall pay _ _ _ _ _ _ _ _ _ yuan;

2 If the monthly gas cost is Y (yuan) and the monthly gas consumption is X after price adjustment, the relationship between Y and X is as shown in the figure, and the value of A and the functional relationship between Y and X are found;

3 Under the condition of 2, if user B uses gas 175 m 3 in February and March (the monthly gas consumption is lower than the monthly gas consumption) and * * * pays 455 yuan, what is the gas consumption of user B in February and March?

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