Multiple choice

A train covers a distance of 3584 km in 2 days 8 hours. If it covers 1440 km on the first day and 1608 km on the seocnd day, by how much does the average speed of the train for the remaining part of the journey differ from that for the entire journey? एक ट्रेन 3584 किमी. की दूरी को 2 दिन 8 घंटे में तय करती है | यदि यह 1440 किमी. की दूरी पहले दिन और 1608 किमी. की दूरी दूसरे दिन तय करती है, ट्रेन की औसत चाल शेष दूरी को तय करने में पूरी दूरी से कितना भिन्न होगी ?

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Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Total time = 2 days 8 hours = 56 hours. Total distance = 3584 km. Average speed for entire journey = 3584/56 = 64 km/hr. Remaining distance after 2 days = 3584 - 1440 - 1608 = 536 km covered in 8 hours, so average speed = 536/8 = 67 km/hr. Difference = 67 - 64 = 3 km/hr.