SOLUTION: Nestor finished a 42-kilometer race in 1 hour and 45 minutes. What was his average speed in kilometers per hour? Please explain how to get the answer. Thanks, Sparrow

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Question 426915: Nestor finished a 42-kilometer race in 1 hour and 45 minutes. What was his average speed in kilometers per hour?
Please explain how to get the answer.
Thanks, Sparrow
Found 2 solutions by rfer, josmiceli:
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
r=D/t
r=42/1.75
r=24 kph

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
You need an answer in km/hr, so you must covert 1 hour and 45 minutes to hours
To convert minutes to hours, the units are:
(minutes) x (hours/minute) = hours
Plugging in numbers:
+45%2A%281%2F60%29+=+3%2F4+, so there are 3%2F4 hours in 45 minutes
Speed is (distance) / (time)
+42+%2F+%281+%2B+3%2F4%29 km/hr
+42+%2F+1.75 km/hr
+24+ km/hr