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John is biking at a rate of 15 mi/h. There are 5280 ft in 1 mi. On average, how many feet does John travel in 1 minute?

 Jun 6, 2018
 #1
avatar+3849 
+3

Solution:

Since there are 5280ft in 1 mile, we can find how many feet are in 15 miles.

 

Converting miles into feet, we have \(5280*15=79,200 \)feet.

 

So, he travels 79,200 feet in 1 hour or 60 minutes.

 

Since they're asking us to find how many feet he can travel in 1 minute, we can easily do: \(\frac{79,200}{60}=\boxed{1,320} \)

feet.

 

 

smileysmiley

 Jun 6, 2018
 #2
avatar+16445 
+3

Via dimensional analysis solution:

 

15  m/hr  x  1/60 hr/min  x  5280 ft/m  = 1320 ft/min       (as Tertre found)

 Jun 6, 2018
 #3
avatar+96302 
+2

Here's one more way :

 

60 mph  = 88 ft/sec

 

So

 

15 mph  = 22 ft/ sec

 

So...in 60 seconds we have    60 * 22  =  1320 ft

 

 

 

cool cool cool

 Jun 6, 2018

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