An aeroplane covers a certain distance at a speed of 240 kmph in 5 hours. To cover the same distance in 1 2/3 hours, it must travel at a speed of:	Choices
A) 520 kmph
B) 300 kmph
C) 400 kmph
D) 720 km/hr
E) 780 km/hr
Distance = (240 x 5) = 1200 km.   Speed = Distance/Time   Speed = 1200/(5/3) km/hr. 1 2/3 hours =5/3 hours   Required Speed = 1200x3/5 km/hr =720 km/hr   answer :720 km/hr
<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 2/3 hours, it must travel at a speed of: