SOLUTION: A ship sailed 30 kilometers in 1 and half hours. What was rate in kilometers per hour?

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Question 549118: A ship sailed 30 kilometers in 1 and half hours. What was rate in kilometers per hour?
Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
Why not use the formula D = rt?

Let D = 30

Let t = 1.5 hours

We are looking for r, which is the rate or speed of the ship.

30 = r(1.5)

30/1.5 = r

20 kilometers per hour = r