Question

an aeroplane takes 3hours to cover a distance of 3600km . another aeroplane travels at a speed which is 100km/hr less than first aeroplane. how long will the second aeroplane takes to cover the same distance.

Answer 1

Time= Distance/ Speed
T= 3600/100
T= 36 Hr

Answer 2

a aeroplane covers 3600 in 3 hours

so speed is 1200km/hour

another aeroplane takes 100km/hour than previous aeroplane

so its speed will be 1100 km/hour

t=d/s

t=3600/1100
is 36/11 hour