Question

Andrea can ride her bike 2 mi/h faster than ruby. It takes Andrea 48 min less the travel 50 mi than it does ruby. What is Andrea's rate in mi/h?

Answer 1

http://answers.yahoo.com/question/index?qid=20110521224141AAPFlp8

Answer 2

-__-... she doesn't even show the steps. I need steps

Answer 3

Let us assume that the speed of Andrea to be x.
Then the speed of Ruby will be x-2.
\(\large speed=\LARGE\frac{distance}{time}\)
Say the time taken by Andrea to cover 50 miles is t.
\(\large x=\LARGE\frac{50}{t}\)
\(50=xt\)
The time taken by Ruby to cover the same 50 miles=t+48
\(\large x-2=\LARGE\frac{50}{t+48}\)
\(50=(x-2)(t+48)\)
\(xt=(x-2)(t+48)\)
Can u find x nw?

Answer 4

@steeben can u do?