Question 399630
Let the first car the rate is x kilometers per hour , 
then the second car rate is (x+20)kilometers per hour 
in 2 hours the first car drove {{{2*x}}} kilometers
in 2 hours the second car drove {{{2*(x+20)}}} kilometers
Together they drove {{{2*x+2*(x+20)=380}}} 
{{{2*x+2*x+40=380}}} 
{{{4*x=380-40}}} 
{{{4*x=340}}} 
{{{x=340/4}}}
 {{{x=85}}}kilometers per hour the rate of the first car
{{{(x+20)=85+20=105}}} kilometers per hour the rate of the second car
Answer: 105 kilometers per hour the rate of the faster car