An aeroplane covers a certain distance at a speed of 240 kmph in 5 hours. To cover the same distance in 1 hours, it must travel at a speed of:  Choose the correct option
A) 300 kmph  B) 360 kmph  C) 600 kmph  D) 720 kmph  E) 400 kmph
Distance = (240 x 5) = 1200 km.   Speed = Distance/Time   Speed = 1200/(5/3) km/hr. [We can write 1(2/3) hours as 5/3 hours]   Required speed =1200 x3/5km/hr= 720 km/hr.   Answer:720 kmph
<result>D</result>
An aeroplane covers a certain distance at a speed of 240 kmph in 5 hours. To cover the same distance in 1 hours, it must travel at a speed of: