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Brice rides his bike at a constant speed of 8 mi/h for 15 minutes, then speeds up and rides at a constant speed of 10 mi/h for 30 minutes. During these 45 minutes, how many miles did he travel?

 

Answer: 7 miles

 

Do you have to find for 15 minutes and 30 minutes?

mathtoo  May 30, 2018
 #1
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yes

you need to convert minutes to hours, you can use a ratio

 

then 8*(15/60) + 10*(30/60) = 7 miles

Guest May 30, 2018
 #2
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Yes, you have to:

 

First, 8 miles- 8 miles=60 minutes, 2 miles=15 minutes

 

Next, 10 miles- 10 miles=60 minutes, 5 miles=30 minutes

 

Thus, \(5+2=\boxed{7}\) miles.

smileysmiley

tertre  May 30, 2018

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