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If something moves 100 feet in 4.8 seconds; how many MPH is it going

2007-07-28 21:45:26 · 6 answers · asked by Anonymous in Science & Mathematics Mathematics

and in english please not smart people talk

2007-07-28 21:56:43 · update #1

6 answers

This can be answered in steps.

1 mile is 5,280 feet, so if you go 100 feet in 4.8 seconds, that's the same as saying you go 100/5280 miles in 4.8 seconds.

(You could convert the 100/5280 to a number at this stage, but I've left that to the end - it gives the same answer)

Next you can look at the time side. There's 60 seconds in a minute, and 60 minutes in an hour, so there's 60*60=3600 seconds in an hour.

So 100/5280 miles in 4.8 seconds is the same as 100/5280 miles in 4.8/3600 hours.

The last stage is to get this to the distance gone in one hour, rather than 4.8/3600 hours.

We've gone 100/5280 miles in 4.8/3600 hours, so multiply by 3600 and divide by 4.8 to get this to the distance in one hour, or

(100 * 3600)/(4.8*5280)
=360000/25344
=14.2 mph

2007-07-28 22:49:16 · answer #1 · answered by bobbles_the_penguin 2 · 0 0

if 100 feet in 4.8
so
1 feet takes 0.048 seconds
and
1 mile = 5280 feet
so
5280 x 0.048 = 253.44 seconds
so
One mile will take 4 minutes and 13.44seconds

for calculation of MPH

100 feet in 4.8
one hour will do 75000 feet
750000 / 5280 = 14.2MPH

2007-07-28 22:03:27 · answer #2 · answered by S. Sulivan 5 · 0 0

1 feet = 0.3048 meters
so 100 feet=30.48 metres
thus speed = distance/time
so speed=30.48/4.8=6.5
simpleee

2007-07-28 21:52:32 · answer #3 · answered by titu-the matrix 2 · 0 0

100 feet = 0.0189393939 miles-->Distance
4.8 seconds = 0.00133333333 hours--->Time

Speed = Distance / Time
so, it is going
about
14 miles per hour

2007-07-28 21:55:28 · answer #4 · answered by NKS 2 · 2 0

OOh for metric

2007-07-28 22:32:11 · answer #5 · answered by Freethinking Liberal 7 · 0 0

is this for a speeding ticket?

2007-07-28 21:55:34 · answer #6 · answered by Sid 2 · 0 0

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