Question

A dolphin is swimming at a depth of –3.4 meters with respect to sea level when it begins diving deeper at a constant rate of –0.25 meter per second. In how many seconds will the dolphin reach a depth of 9.9 meters below sea level?

Answer 1

Answer: 26 s

Explanation:

Given

Dolphin is 3.4 meters below the sea level

It started moving at a rate of
`-0.25\ m/s`

Distance travel in the vertical direction by dolphin is

`\Rightarrow 9.9-3.4=6.5\ m`

time taken is given by

`\Rightarrow time(t)=\frac{\text{Distance}}{\text{Speed}}\\\\\Rightarrow t=(6.5)/(0.25)=26\ s`