It took jaytree 42 seconds to rip about half a dvd. about what is jaytree’s “ripping rate” in dvds per minute?

You can solve this problem by using the following rule of three:
 42 s > 0.5 DVD
 x > 1 DVD
 Clearing x:
 x = (1 / 0.5) * (42)
 x = 84 s (time to complete a DVD)
 Then, we have the following conversion:
 1min = 60s
 So:
 x = (84/60)
 x = 1.4 min
 The rate is then:
 rate = 1 / 1.4 = 0.71 DVD / minute
 
 Jaytree's "ripping rate" in DVDs per minute is
 0.71 DVD / minute

4hours and 40 mins she would be 120 meters high

Sorry i meant b in the other question