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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?

mathtoo  Jun 6, 2018
#1
+3518
+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.

tertre  Jun 6, 2018
#2
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Via dimensional analysis solution:

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

ElectricPavlov  Jun 6, 2018
#3
+92997
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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

CPhill  Jun 6, 2018