Posted by Larry on Tuesday, September 30, 2008 at 11:00pm.
1st plane flew at 600km/h
15 minutes later.....
2nd plane flew at 700km/h
how long did it take the 2nd plane to overtake the 1st plane?
for my answre, I got 1.75h
Is this correct? The book said it was 1.5
Thanks

Math  Reiny, Tuesday, September 30, 2008 at 11:17pm
I got 1.75 hours for the time of the slower plane, but it asked for the time of the faster plane
15 minutes = .25 hours
so 1.75  .25 = 1.5, the answer in your book