Question

an aeroplane travels 2000 km at a rate of 500 km/hr,1200k km at a rate of 300 km/hr and 500 km at a rate of 250km/hr. f oh ND the average speed for the entire journey
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Answer 1

Answer:

time=distance/speed

time=2500/500+1200/400+500/250

5+3+2=10 hrs

speed=total distance/time

(2500+1200+500)/10

4200/10=420 km/h(ans)

Answer 2

Step-by-step explanation:

2500/500+ 1200/400+

=5+3+2 =10

=2500+1200+500

=4200

4200/10

=420kmAns