A car can finish a certain journey in 9 hours at the speed of 72 km per hour by how much should its speed beat increase so that it may take only 8 hours to cover the same distance
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Answered by
5
x = vt
x = 72×9
again x= vt
72×9= v×8
v= 81km/hr
x = 72×9
again x= vt
72×9= v×8
v= 81km/hr
Answered by
7
total time taken=9 hours to cover a journey at the speed of 72 km/h
speed increased=72×9=648
=648/8=81 km/h ans
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