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An aeroplane leaves an airport and flies due north at a speed of 1000km per hour. At the same time, another aeroplane

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An aeroplane leaves an airport and flies due north at a speed of 1000km per hour. At the same time, another aeroplane leaves the same airport and flies due west at a speed of 1200 km per hour. How far apart will be the two planes after 1 1/2 hours?

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Let A be the first aeroplane flied due north at a speed of 1000 km/hr and B be the second aeroplane flied due west at a speed of 1200 km/hr

⟹ AB = 300 √61 m 

Hence, the distance between two planes after 11/2 hours is 300 √61 m.

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