Question

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​

Answer 1

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