Question

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. 13 feet below the surface of the lake.
• B. 17 feet below the surface of the lake.
• C. 21 feet below the surface of the lake.
• D. 26 feet below the surface of the lake.

Answer 1

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)
Then rises 12 feet -------- ( +12)
Descend of 18 feet ------- ( -18)
Final position of the diver = (-20 +12 -18) feet = -26 feet
Therefore, the man is now at 26 feet below the surface of the lake.