EE.6 Travel distance and railway fare

Table 1 expresses the travel distance between the stations of a certain railroad.
Moreover, the relation between the travel distance of this railroad and a fare is shown as Fig. 1.
In the graph of Fig. 1, the point indicated by ○ is not included in a graph the point indicated by ● is included in the graph.

For example, the travel distance from B station to C station is 185.8 km and the fare is 3810 yen.

The travel distance from B station to D station is 240 km and the fare is 4430 yen.
Even when travel distance exceeds 260 km, the rule of the fare of Fig. 1 is applied.
Answer the following questions.

(1) Find the travel distance from A station to D station.

(2) After Taro got on from A station to B station and finished shopping, he got on from B station to D station.
Jiro got on from A station to D station without stopping over.
How much was the sum total of the fare which Taro paid more than the fare which Jiro paid?






Answer
(1) 420.2 km
(2) 710 yen