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

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