Equations in calculating the average speed of a vehicle

question 1

(Vunesp) When passing the “200 km” mark of a highway, a driver sees an advertisement with the inscription: “SUPPLY AND RESTAURANT 30 MINUTES”. Considering that this service station is located next to the mark "km 245" of this highway, it is possible to conclude that the advertiser predicts, for the cars that travel on this stretch, an average speed, in km/h, from:

a) 80

b) 90

c) 100

d) 110

e) 120

question 2

(PUCCamp-SP) In a car race, suppose the winner spent 1 h 30 min to complete the circuit, developing an average speed of 240 km/h, while another car, the runner-up, developed an average speed of 236 km/h. If the track is 30 km long, how many laps did the winning car get ahead of the runner-up?

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