If a train runs at 40 kmph, it reaches its destination late by 11 minutes but if it runs at 50 kmph, it is late by 5 minutes only. The correct time for the train to complete its journey is :
A. 13 minutes
B. 15 minutes
C. 19 minutes
D. 21 minutes
সঠিক উত্তরঃ
C.
19 minutes
Explanation:
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