Multiple choice

A train had to cover a distance of 46 km. between two stations. If it covers 25 km. at the speed of 40 kmph then at what speed it must travel the remaining distance? एक ट्रेन को दो स्टेशनों के बीच की दूरी 46 किमी. को एक घंटा में तय करना है यदि वह 25 किमी. दूरी तक 40 किमी./घंटा की चाल से चलती है तो उसको शेष दूरी किस चाल से तय करनी चाहिए ?

  1. 40 kmph/किमी./घंटा

  2. 50 kmph/किमी./घंटा

  3. 56 kmph/किमी./घंटा

  4. 72 kmph/किमी./घंटा
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C Correct answer
Explanation

Total distance = 46 km, total time = 1 hour. Distance covered in first part = 25 km at 40 kmph. Time taken = 25/40 = 5/8 hour = 37.5 minutes. Remaining time = 60 - 37.5 = 22.5 minutes = 0.375 hours. Remaining distance = 46 - 25 = 21 km. Required speed = 21/0.375 = 56 kmph. Therefore, the train must travel at 56 kmph for the remaining distance.

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