70
make 30 minutes into an hour then divide 140 by 2
140/2=70
70x1=70
Answer:
60 miles per hour
Step-by-step explanation:
For each point just divide the miles by the hour
120/2 = 60 mph
180/3 = 60 mph
240/4 = 60 mph
6/8. multiply 3/4 by 2 and there is your answer.
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