Question

A drive descends 20 feet in the water from the boat at
surface of a lake. He then rose
12 feet & descends another 18 feet. At this point what is his depth in water .
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Answer 1

Step-by-step explanation:

When a diver descends 20 feet, the depth of water here is 20 feet

The diver then ascends 12 feet;

Depth of water = 20 - 12 

                         = 8 feet

The diver then descends another 18 feet

The depth of water here = 8 + 18

                                       = 26 feet

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Answer 2

Initially, he is at the surface of the lake,

Then he Dives 20 feet into the water,

Depth=20 feets

Then he rises 12 feet, Depth = 20-12 =8 feets

Then he again descends 18 feet, depth = 8+18 = 26 feets

So his final depth in the water is 26 feets.