# Rates

When gas consumption, the consumer may choose one of two rates:
1. rate A - which pays 0.4 € per 1 m3 of gas a flat monthly fee of 3.9 € (regardless of consumption)
2. rate B - which pays 0.359 € per 1 m3 of gas a flat monthly fee of 12.5 €

From what monthly consumption is more convenient for the customer rate B?

Result

x =  209.8 m3

#### Solution:

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Thomas

Dr Math
we think that maybe "hacking mathematics" or "play with mathematics". All relevant domains is occupied.

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