A video cassette tape has a running time of 1 hour while at standard speed, 4 hours while at long-play
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speed, and 7 hours while at super long-play speed. If of the tape is recorded at standard speed,
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at long-play speed, and at super long-play speed, what is the total running time of the video
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cassette tape? Write the solution as a mixed number or a fraction in lowest terms.
