a train moving at a speed of 60 km/hr cover a certain distance in 7.5 hours.what should be the speed of the train to cover the same distance in 6 hours.

+2 votes
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asked Jan 30, 2016 in Class VIII Maths by twinkle Basic (20 points)

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2 Answers

+4 votes
answered Feb 3, 2016 by kp0908 Premium (741 points)
Speed of the train = 60 km/hr
Time = 7.5 hrs
So the distance covered = speed × time = 60 × 7.5 = 450 km
Now the speed required to cover a distance of 450 km in 6 hours is given by;
Required speed = distance time   =   450 6   = 75 km/hr
Therefore the speed of train should be 75 km/hr to cover the same distance.
0 votes
answered Jan 17, 2018 by Yanru Expert (2,115 points)
60×7.5=x×6
450=x×6
450=x×6
x=75km/hr

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