A speed of 88 feet per second is equal to a speed of 60 mph.

[cbaconton]

A speed of 88 feet per second is equal to a speed of 60 miles per hour. If the speed of sound is 750 mi/hr, what is the speed of sound in feet per second?

can someone help me out and show me how to do this.. i keep getting stuck halfway there and end up wrong everytime.. can someone map out the answer for me.. pls.. :roll: :?:

 

[soroban]

Re: speed of sound

Hello, cbaconton!

A speed of 88 ft/sec is equal to a speed of 60 mph.
If the speed of sound is 750 mph, what is the speed of sound in ft/sec?

We are told that: \(\displaystyle \,88\text{ ft/sec} \:=\:60\text{ mph}\) . . . that is: \(\displaystyle \:\frac{88\text{ ft/sec}}{60\text{ mph}} \,=\,1\,\) *

We want: \(\displaystyle x\text{ ft/sec} \:=\:750\text{ mph}\) . . . where: \(\displaystyle \frac{x\text{ ft/sec}}{750\text{ mph}}\,=\,1\;\) *

Equate the two fractions: \(\displaystyle \L\:\frac{x}{750} \:=\:\frac{88}{60}\)

. . and solve for \(\displaystyle x.\)

 

[stapel]

can someone help me....i keep getting stuck halfway

Most tutors won't "do" students' work for them so, in the future, please consider showing your work.

Thank you for your consideration.

Eliz.

 

[Denis]

Li'l time saver trick:

Let symbol ~ mean "is equivalent to"

if a ~ x
then b ~ x / a * b

if 60 ~ 88
then 750 ~ 88 / 60 * 750