Question

a plane 30 mins late than its scheduled time and in order to reach the destination 1500 km
away in time, it had to increase its speed by 100km/h from the usual speed. Find its usual speed.​

Answer 1

Distance=1500km

usual speed=x

increased speed=100km/hr

Late = 30 min=1/2 hr

TIME=Dist/speed

1500/X-1500/100+x=1/2

solving >x=500

usual speed=500km/hr

Answer 2

Answer:

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