SOLUTION: One car travels at 30 km/h faster then another. While one travels 300 km the other travels 450 km. find their speed
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Question 940619: One car travels at 30 km/h faster then another. While one travels 300 km the other travels 450 km. find their speed
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
One car travels at 30 km/h faster then another.
While one travels 300 km the other travels 450 km.
find their speed
:
let s = the slow car's speed
then
(s+30) = the faster car's speed
:
Speed and distance are directly related, write a proportion equation
=
cross multiply
450s = 300(s+30)
450s = 300s + 9000
450s - 300s = 9000
150s = 9000
s = 9000/150
s = 60 km/hr is the slow car speed
and obviously,
90 km/hr is the fast car speed
:
;
You can confirm this by finding the time of each, should be equal
300/60 = 5 hrs
450/90 = 5
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