SOLUTION: during a race john has 40 second lead over mary. john runs at a speed of 1.15 meters per second, and mary runs at a speed of 2 meters per second. how long will it take mary to ove

Question 655087: during a race john has 40 second lead over mary.
john runs at a speed of 1.15 meters per second, and mary runs at a speed of 2 meters per second. how long will it take mary to overtake john?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
during a race john has 40 second lead over mary.
john runs at a speed of 1.15 meters per second, and mary runs at a speed of 2 meters per second. how long will it take mary to overtake john?
**
let x=mary's travel time
x+40=john's travel time
..
distance=travel time*speed (same for both)
1.15(x+40)=2x
1.15x+46=2x
.85x=46
x≈54.1
how long it will take mary to overtake john≈54.1 sec

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