4. A car with speed 60 km/hr tokes 8 hours to travel some distance. What
should be the increase in the speed if the same distance is to be covered in
hours?
7.5 hours
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Total distance travelled= 60*8 = 480km
Increase of speed if time = 7.5hr
Speed = d/t = 480/7.5 = 64km/hr
Increase in speed = 64-60 = 4km/hr
Increase of speed if time = 7.5hr
Speed = d/t = 480/7.5 = 64km/hr
Increase in speed = 64-60 = 4km/hr
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