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2011年8月4日星期四

How many mph are you going if you travel 40 miles in 30 minutes?

-question says it allCan you see 40 miles? There really is no concept of what 40 miles looks like. It is just a distance. So translate the speed into another aspect. 40 miles in 30 mins comes out to 80 mph. Or put another way: 80 x 5280 (ft in mile) = 422,400 feet/hr; divided by 60 (minutes) = 7040 (ft/min) divided by 60 (seconds) = 117.3 feet/second. And that you can see. In other words, you will travel the length of a football field (300 ft) in 2.56 seconds.
I asked my niece in fourth grade.

Her answer is 80 mph.

Convert 30 minutes to hours. 60/30 = .5 hours.

2*.5 = 1 hour

2*40 miles = 80 miles

Since I gave you the answer to your homework assignment, what have you learned? Very little.

Sad
my 4th grader says 80mph since in 60 min youd go 80 miles
80

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