An aeroplane travels distnaces 2500 km 1200 km and 500 km at the rate of 500 km hr 400 km hr and 250...........

Quantitative Aptitude ( CCS) Time & distance

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

420 km/hr

410 km/hr

405 km/hr

575 km/hr

Average speed = total distance /total time

total distance = 2500 + 1200 + 500 = 4200

total time = 2500/500 + 1200/400 + 500/250 = 5 + 3 + 2 = 10

average speed = 4200 /10 = 420 km/hr

Hence, option 1 is the correct answer.

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