An aeroplane covers a certain distance at a speed of 240 kmph in 6 hours. To cover the same distance in 1 2/3 hours, it must travel at a speed of:  Choose the correct choice.
A) 520
B) 620
C) 820
D) 740
E) 864
Distance = (240 x 6) = 1440 km.   Speed = Distance/Time   Speed = 1440 /(5/3) km/hr. [We can write 1 2/3 hours as 5/3 hours]   Required speed = (1440x3/5) km/hr = 864 km/hr   Answer 864) 864 Km/hr
<result>E</result>
An aeroplane covers a certain distance at a speed of 240 kmph in 6 hours. To cover the same distance in 1 2/3 hours, it must travel at a speed of: