A diver descends $20$ feet underwater from a boat on the surface of the lake. He then rose $12$ feet and descends another $18$ feet. Find his final position.

13

feet below the surface of the lake

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17

feet below the surface of the lake

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21

feet below the surface of the lake

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26

feet below the surface of the lake

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Solution

The correct option is D $26$ feet below the surface of the lake
Let the initial position of the diver be $0$ .
Descend of $20$ feet $= - 20$
Rise of $12$ feet $= + 12$
Descend of $18$ feet $= - 18$
Therefore, final position of the diver $= - 20 + 12 - 18 = - 26$ feet
Hence, the man is now at $26$ feet below the surface of the lake.

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A diver descends 20 feet underwater from a boat on the surface of the lake. He then rose 12 feet and descends another 18 feet. Find his final position.​

A diver descends $20$ feet underwater from a boat on the surface of the lake. He then rose $12$ feet and descends another $18$ feet. Find his final position.