Question

a car moves with a speed of 57 km per hour it takes 8 hours to travel A certain distance how much should its speed we increase so that it can cover the same distance in 6 hour​

Answer 1

hope this answers ur question

Answer 2

speed =distance / time

let, speed = x

distance = constant or represent it with "k"

and time =y

x = k/y

In first case,

x =57,y= 8

so,

57=k/8

57 ×8 =k

in second case

x =?

y =6

k= 57×8

so,

x=k/y

x=57×8/6

x= 19×4

x= 76

ans: To reach at a distance in 6 hours so we have to travel at the speed of 76 km per hour.

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