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Question

Q40. If a train runs at 40 km/h, it reaches its destination late by 11 min, but if it runs at 50 km/h, it is late by 5 min only. The correct time for the train to complete its journey is


A

(a) 12 min

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B

(b) 16 min

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C

(c) 19 min

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D

(d) 25 min.

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Solution

The correct option is C

(c) 19 min


Let the correct time to complete the journey be x minutes.

Distance covered in (x+11) min at 40 km/h.

= Distance covered in (x+5) min at 50 km/h

(x+11)60×40=(x+5)60×50x=19 min


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