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13 September, 10:51

Two planes left simultaneously from the same airport and headed in the same direction towards another airport 1800 km away. The speed of one of the planes was 100 km/hour slower than the speed of the other plane, and so it arrived at its destination 36 minutes after the faster plane. Find the speeds of both planes.

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  1. 13 September, 12:07
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    Faster plane - -> 600km/hr

    Slower Plane - -> 500km/hr

    Step-by-step explanation:

    Use inequality: 1800/r = 1800 / (r-100) + 3/5 and solve to get r = 600, so the plane which is r - 100 is 500 km/hr.
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