Question

Taking sea level as zero, distance below sea surface as negative and distance above sea surface as positive, find the integers corresponding to the following situation:
A shark, swimming 40 m deep, sees a diver 20 m above him. The positions of shark and diver are

• A. - 40 m and - 20 m respectively.
• B. - 20 m and - 40 m respectively.
• C. 40 m and 20 m respectively.
• D. - 40 m and 20 m respectively.

Answer 1

The correct option is A - 40 m and - 20 m respectively.


Distance below the water surface is considered as negative.

• The shark is 40 m below the water surface.

$\Rightarrow$ The position of the shark is - 40 m.

• The diver is diving 20 m above the shark.

$\therefore$ The final position of the diver is
(- 40) + 20 = - 20 m