Kerri drives 150 miles to visit her grandmother. She starts off driving 60 miles per hour, but then encounters road construction and has to drive 20 miles per hour the rest of the way. If she spends the same amount of time at the faster speed as at the slower speed, then how many hours did her 150-mile trip take in total?

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Jasper Wolfe

19 December, 21:09

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Pretty · Answer 1

3 hours 30 minutes, (60 + 20) + (60 + 10) (normally 20 but enough to finish it) = so 150 miles. 1/2 of 20 is 10, 1/2 of an hour is 30 minutes.