Question

The water level in an ocean changes at an average rate of 3 meters per hour. At this rate, how many hours would it take for the water level to change 12 meters?

Answer 1

Answer: 4 hours

Explanation:

The water level changes at an average rate of 3 meters per hour.

The question wants to know how long it will take for the ocean water level to change 12 meters.

You can use direct proportion:

1 hour : 3 meters

x hours : 12 meters

Cross multiply to get:

3x = 12

x = 12 / 3

= 4 hours