Question 32523
Le the time be x:
She is delayed 30 minutes is probaly the hardest part of this eqaution:
Delyaed 30 minutes from original time gives us:
x-0.5 because 30 minutes = 0.5hours.
15 minutes later means x+0.25. 15 minutes is 0.25 hours.
Eqaution:
40(x+0.25)=60(x-0.5)
40x+10=60x-30
-20x=-40
x=2
2-0.5=1.5
Hence, it will take her 1.5 hours to catch up with John.
Paul.