A submarine is diving at a depth of 500 meters. Every 3 minutes, it descends another 50 meters. It then reaches a depth of 1,000 meters.

How long did it take for the submarine to reach the depth of 1,000 meters?
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2 points
5 minutes
10 minutes
20 minutes
30 minutes
40 minutes

1 answer

To find out the time it took for the submarine to reach a depth of 1,000 meters, we need to divide the total distance it traveled (500 meters) by the distance it covered every 3 minutes (50 meters).

500 meters / 50 meters = 10

Therefore, it took the submarine 10 cycles of descending 50 meters every 3 minutes to reach a depth of 1,000 meters.

Since each cycle takes 3 minutes,

10 cycles * 3 minutes/cycle = 30 minutes.

Therefore, the submarine took 30 minutes to reach a depth of 1,000 meters.