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7 March, 11:06

The small submarine is at - 1,320 feet in relation to sea level. The submarine needs to be at 180 feet below sea level in 60 minutes.

What does the average rate of ascent need to be?

A. 19 feet per minute

B. 18 feet per minute

C. 17 feet per minute

D. 16 feet per minute

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Answers (1)
  1. 7 March, 14:57
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    Current depth: - 1,320 ft

    Needed depth: - 180 ft

    -1,320 - (-180) = - 1,140 ft

    We need to climb at a rate of 1,140 feet per 60 minutes, or 19 feet per minute, to read 180 feet below sea level. Answer A is correct.
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