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An aeroplane travels distances 2500 km, ...

An aeroplane travels distances 2500 km, 1200km and 500km at the rate of 500 km/hr, 400 km/hr, and 250 km/hr, respectively. The average speed is

A

420 km/hr

B

405 km/hr

C

410 km/hr

D

575 km/hr

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The correct Answer is:
A
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