word problem for mathematics

label Mathematics
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schedule 1 Day
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May 20th, 2015

Let s be the actual speed 

Time taken 

336/ s

faster speed = s + 6

faster time 

336/ (s +6)

Diffrence in time =1

336/s  - 336/ (s +6) =1

336/ s   -1 = 336/ (s +6)

336 – s     =    336

    s                (s + 6)

(336 – s )  (s + 6) = 336 s

336 s +    2016 – s² – 6s = 336 s

 s² +6s  - 2016 = 0

s = -6 + 90

         2 

= 84/2 

= 42 mph


May 20th, 2015

Attached as doc X any problems contact me asap

speed.docx 

May 20th, 2015

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