Question

Starting at sea level, a submarine descends at a constant rate to a depth of −5/6 mile relative to sea level in 4 minutes. What was the submarine's depth relative to sea level after the first minute?
(NOTE: there are no answer choices)

Answer 1

I'm pretty sure it would be -5/24

Answer 2

Answer:

Submarine's depth after first minute will be -$\frac{5}{24}$

Step-by-step explanation:

Submarine is descending at a constant rate = -$\frac{5}{6}$ miles in 4 minutes

Therefore, after the first minute submarine's depth relative to the sea level will be

= $\frac{\text{Rate at which submarine is descending}}{\text{Time taken}}$

= $-\frac{5}{6\times 4}$

= -$\frac{5}{24}$

Therefore, submarine's depth after first minute will be -$\frac{5}{24}$