A Train covers a certain distance at a speed of 120 kmph in 10 hours . To cover twice the distance in 313 hours, it must travel at a speed of:
Explanation:
Distance = (120 ×10) = 1200 km.
Speed = Distance/Time
Speed = 2400/(10/3) km/hr
⇒ Required speed = 2400 × 3/10 km/hr = 720 km/hr.
Hence, option (b).
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