a train covers a distance in 9 hours at the speed of 80km/h.how much time would it take to cover the same distance if it moved 20km/h slower
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Total distance covered: 60*8 = 480 Kms.
Speed needed to cover distance of 480 km in 6 hrs= 480/6= 80 km/hr.
Original speed : 60 km/hr.
Train needs to run faster with speed of 20km/hr to achieve same distance in 6 hrs.
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