Prephub - Mr Lopez has a choice of two routes to get to work Route A is 6 miles long and his average speed along this route is 30 miles per hour Route B is 5 miles long and his average speed along this route is 40 miles per hour except for a frac12 mile stretch in a school zone where his average speed is 20 miles per hour By how many minutes is Route B quicker than Route A

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MCQ

Mr. Lopez has a choice of two routes to get to work. Route A is $6$ miles long, and his average speed along this route is $30$ miles per hour. Route B is $5$ miles long, and his average speed along this route is $40$ miles per hour, except for a $\frac{1}{2}$ mile stretch in a school zone where his average speed is $20$ miles per hour. By how many minutes is Route $B$ quicker than Route $A$ ?

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