Question

A submarine descended 1200 meters below the surface of the water. It then rose 800 meters and then descended 250 meters.

What was the submarine's net gain or loss in altitude? {Note: m stands for Meters}

A. -1200 m

B. -650 m

C. -400 m

D. 650 m

Answer 1

-1200 + 800 - 250 = -650

Answer 2

Descending = (-1200)

Ascending = -1200 + 800 = (-400)

Again, descending = -400 -250 = (-650)

So, its 650 m below sea level.