A

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Q. A train cover a distance in 50 minutes, if it runs at a speed of 48 km per hour on an average. The speed at which the train must run to reduce the time of journey to 40 minutes ?

  • (A) 50 km/hr.
  • (B) 55 km/hr.
  • (C) 60 km/hr.
  • (D) 70 km/hr.
  • Correct Answer - Option(C)
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Explanation by: Admin
Total Distance = 48 x (50/60) km.
= 40 km

Required speed = [40 / (40/60)] km.
= (40 x 60 )/ 40 km/hr.
= 60 km/hr.

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