Question

The Sognefjord is the deepest fjord in Norway at 1,308 metres (4,291 ft) If a submersible floating on the surface was to dive vertically at a rate of 35 meters a minute, how many minutes would it have been diving when it reached a point 48 meters from the bottom of the fjord?

Answer 1

36 minutes

Explanation:

Depth of the fjord = 1308 m

Rate at which the submersible dives = 35 meters/minute

Distance to the bottom of the fjord should be 48 m

Distance the submersible has to go underwater is
`1308-48=1260\ \text{m}`

Time is found by dividing the distance the submersible has to go underwater by rate at which the submersible dives

`(1263)/(35)=36\ \text{minutes}`

The time taken by the submersible to dive the required distance is 36 minutes.