.
Let t be the time to intercept, in hours.
Then the aircraft will cover the distance of 350*t kilometers,
while the plane will cover 450*t kilometers.
The sum of these distances is 200 kilometers, which gives you an equation
350*t + 450*t = 200.
Simplify and solve for t :
800*t = 200
t = = of an hour = 15 minutes. AMSWER
Solved.
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