Question 1031905
The two planes, each traveling at their own speed, have to travel a total of 200km, when one intercepts the other.
x = travel time of both aircraft
1st aircraft + 2nd aircraft = 200 km
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350x + 450x = 200
800x = 200
x = 200/800
x = 1/4 hr or converted to minutes: 15 min to intercept