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#1 2007-02-06 12:39:01
- com2rest
- Guest
math
In the time it takes one car to travel 93 km a second car travels 111km If the average speed of the second car is 12 km/h faster than the speed of the first car, what is the speed of each car:wav
#2 2007-02-06 13:30:29
- com2rest
- Guest
Re: math
In the time it takes one car to travel 93 km a second car travels 111km If the average speed of the second car is 12 km/h faster than the speed of the first car, what is the speed of each car:wav
please help can not figure equa
tion 8 grade math student
#3 2007-02-06 14:20:12
- Puppydog
- Guest
Re: math
I have the same question in my book but I do not know how to solve it.
Anwer :62km/per hour and 74km/per hour
Is their any smart people out there 
#4 2007-02-06 16:20:54
- pi man
- Member
- Registered: 2006-07-06
- Posts: 251
Re: math
The one car travel 18 miles more than the other.
The speed of one car is 12 mph faster than the other. To get 18 miles ahead of the other car, they must have been driving for 1 1/2 hours.
One car went 93 miles in an hour and a half:
93 / (3/2) = 93 * 2/3 = 62 mph
The other car went 111 miles:
111 / (3/2) = 111 * 2/3 = 74 mph.
I just realized that all my units should have been km rather than miles. Same numbers, different units.
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