book Maths Puzzle Numerical Ability

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Susan drove 3.35 hours at a rate of 50 miles per hour. To the nearest tenth, how long would it take her to drive the same distance at a rate of 45 miles per hour?

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book Other Question

A racetrack measures 5 miles long. If an automobile completes the track in exactly 4 minutes, what is its average rate of speed in miles per hour? A water balloon is dropped from a cliff. Exactly 3 seconds later the sound of the balloon hitting the ground reaches the top of the cliff. How high is the cliff?