Question

Which is the same as 6 mph?

A) 528 ft/hr
B) 6336 ft/sec
C) 15,840 ft/hr
D) 31,680 ft/hr

Answer 1

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❖ The correct answer choice is D) 31,680 ft/hr

1 mi = 5,280 ft

5,280 x 6 = 31,680 ft/hr

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Answer 2

Answer: D) 31,680 ft/hr

Explanation:

We know that 1 mile= 5280 feet

Then, the 6 mph can be written as

`\frac{6\text{ miles}}{\text{ 1 hour}}=\frac{6*5280\text{ feet}}{\text{ 1 hour}}\\\\=\frac{ 31,680\text{ feet}}{\text{ 1 hour}}=31,680\text{ ft/hr}`

1 hour = 60 minutes

1 minute = 60 seconds

Then,
`\text{1 hour}=60*60=3600\text{ seconds}`

Then, the 6 mph can be written as

`\frac{6\text{ miles}}{\text{ 1 hour}}=\frac{6*5280\text{ feet}}{1*3600\text{ seconds}}\\\\=\frac{ 8.8\text{ feet}}{\text{ 1 seconds}}=8.8\text{ ft/sec}`

Hence, the correct answer is D) 31,680 ft/hr