SOLUTION: a ship moves 20 km across the sea in 40 minutes, what is the average speed of the ship in kilometers per hour?

Question 882580: a ship moves 20 km across the sea in 40 minutes, what is the average speed of the ship in kilometers per hour?
Answer by Leaf W.(135) (Show Source): You can put this solution on YOUR website!
To find the average speed of the ship in kilometers per hour, you need the total distance in kilometers and the total time in hours. You already have the distance in kilometers (20 km), but you will have to convert the time (40 minutes) to hours using the fact that there are 60 minutes per hour:

Thus, since 40 minutes is the same thing as two-thirds of an hour, we know that the ship moved 20 km in 2/3 of an hour.
To find the average speed in km/h, simply divide the number of kilometers by the number of hours:

Therefore, the average speed of the ship is 30 km/h.
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