A submarine moved from the water surface at a speed of $(- 20) m$ per minute. How far is the submarine from the water surface at the end of $7$ minutes?

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Solution

Consider the water surface
level as zero.

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A submarine moved from the water surface at a speed of (−20)m per minute. How far is the submarine from the water surface at the end of 7 minutes?

Consider the water surface level as zero.

A submarine moved from the water surface at a speed of $(- 20) m$ per minute. How far is the submarine from the water surface at the end of $7$ minutes?

Consider the water surface
level as zero.