Question 1161917
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car speed = twice train speed  -->  car takes half as long<br>
car takes half as long and arrives 2.5 hours before the train  -->  car takes 2.5 hours and train takes 5 hours<br>
cars travels 150 miles in 2.5 hours  -->  average speed 150/2.5 = 60mph<br>
train travels 150 mile in 5 hours  -->  average speed 150/5 = 30mph<br>