An aeroplane covers a certain distance at a speed of 400 km/hr in 8 hours. To cover the same distance in 5 hours, the speed of the areoplane will be:
Answer & explanation
Correct answer: option 1
Speed of the aeroplane = $\frac{distance}{time}$
⇒ 400 = $\frac{distance}{8}$
⇒ distance = 400 x 8 = 3200 km
Speed of the aeroplane when it covers the same distance in 5 hours = $\frac{3200}{5}$
= 640km/hr