Question

An aeroplane takes 3 hours to cover a distance of 3,600 km. Another aeroplane travels at a speed which is 100 km per hour less than the first aeroplane. how long will the second aeroplane take to cover the same distance?​

Answer 1

lets take the two aeroplanes be A &B

plane A takes 3 hrs to travel 3600 km

so speed of Plane A =3600/3=1200 km/hrs (speed= dist/time)

speed of palne B is 100 km/hr less than plane A

so speed of plane B =1200-100=1100 km/hr

time taken by Plane B for the same distance =3600/1100 =36/11=3.2727 hrs (time =dist/speed)

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