A train covers a certain distance at a speed of 200kmph in 4 hours. To cover the same distance in 1 3/4 hours, it must travel at a speed of
Choose the correct choice from the following answers.
A) 400km/hr  B) 457km/hr  C) 450km/hr  D) 650km/hr  E) 750km/hr
Explanation:   Distance = 200Ã—4 = 800km   Required speed = (800Ã— 4/7) = 457km/hr   Answer: Option 457km/hr
<result>B</result>
A train covers a certain distance at a speed of 200kmph in 4 hours. To cover the same distance in 1 3/4 hours, it must travel at a speed of