Question

a submarine left the surface of the water at the rate of -2 m per second. at the rate how long it will take to submarine to reach - 80 m level

Answer 1

time = distance ÷ speed

time
= -80m ÷ -2m/s
= 40s

Answer 2

If speed =-2m/s
Then -80 mtrs will be at 40 seconds from beginning time.