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Question
A submarine was situated at 650 feet below the sea level. If it descends 200 feet, what is its new position?
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Solution
Position of submarine = 650 feet below sea level = − 650 feet
Again the depth it descends = 200 feet below = – 200 feet
∴ Position of submarine = (−650) + (−200) = − 850 feet
The submarine will be 850 feet below the sea level.
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