SOLUTION: Raul found that by increasing his speed by 5 km/hr, he could drive 12km in 0.2 hrs. What was his original speed? ____kilometers per hour

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Raul found that by increasing his speed by 5 km/hr, he could drive 12km in 0.2 hrs. What was his original speed? ____kilometers per hour       Log On


   

Question 225929: Raul found that by increasing his speed by 5 km/hr, he could drive 12km in 0.2 hrs. What was his original speed?
____kilometers per hour

Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!


Remembersystem%28S%5B1%5D=original%2CS%5B2%5D=final%29

SO,
S%5B1%5D%2B5%28km%2Fhr%29=S%5B2%5D
But, S%5B2%5D=12km%2F0.20hr=60%28km%2Fhr%29
Substitute,
S%5B1%5D%2B5=60 ---> S%5B1%5D=60-5
highlight%28S%5B1%5D=55%28km%2Fhr%29%29, Answer

Thank you,
Jojo