Mark had to travel 220 km in 4.5 hours, using a train that travels at the speed 60 km/h or a bus that travels at the speed of 40 km/h, or any combination of the two modes of transport. For how long did he travel by bus?

Mark had to travel 220 km in 4.5 hours, using a train that travels at

1.	Mark had to travel 220 km in 4.5 hours, using a train that travels at the speed 60 km/h or a bus that travels at the speed of 40 km/h, or any combination of the two modes of transport. For how long did he travel by bus?
A.	1 hour
B.	1 hour 30 minutes
C.	2 hours 30 minutes
D.	2 hours
Answer» D. 2 hours

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Mark had to travel 220 km in 4.5 hours, using a train that travels at the speed 60 km/h or a bus that travels at the speed of 40 km/h, or any combination of the two modes of transport. For how long did he travel by bus?

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