Problema Solution
raul found that increasing his speed by 5 km/h, he can drive 12 km in 0.2 hours. what was rawls original speed?
Answer provided by our tutors
EQUATION:
12/x-12/x+5=0.2
12[(x-x+5)]=0.2[(x)(x+5)]
60=0.2x^2+x
X^2+5x-300=0
\Solve tha you get x=15
Hence, he drives at 15mph.
paul.