Question

help will give medal

(01.03)
A student runs 100 meters in 11 seconds. What is the speed of the student?

speed = distance over time ; 1 mile = 1609 meters (2 points)


9.1 miles per hour
16 miles per hour
20.3 miles per hour
24 miles per hour

Answer 1

First, you're going to want to convert meters to miles, so you are working with the right distance measurement.
100 meters in equal to about 0.062 miles.

Answer 2

Give me just a second.

Answer 3

d

Answer 4

Alright, let's do this instead...
Just plug in you're given values.
Refer to that handy formula given to you. "speed = distance over time" which can also be written as s=d/t

Since you're trying to find the runners speed, you would just fill in the appropriate variables with their values.
His distance was 100, so d=100m
His time was 11 seconds, so t=11s

s=100/11
but now we have to convert...

Answer 5

To convert meters to miles, you divide the amount of meters given (100) by the amount in a mile (1609). And convert seconds to hours, divide the amount of seconds given (11) by the amount in an hour (3,600).

\[s = \frac{ \frac{ 100 }{ 1609 } }{ \frac{ 11 }{ 3600 } }\]

Answer 6

Both numbers end up being a bit crazy...
\[s=\frac{ 0.06215 }{ 0.00306 }\]

Answer 7

s = 20.3

Answer 8

20.3 mph is your final answer.

Answer 9

oh ok I forgot the division thank you so much

Answer 10

(what i said)

Answer 11

@BearKolch
It is better for the asker if you show them how to get the answer rather than just giving it.
Also, D would be 24 miles per hour not 20.3

Answer 12

no @BearKolch you said D and 20.3 is C

Answer 13

@shadow2239
You're welcome. :)