Question

If the time to travel a certain distance is needed to decrease by 20%, the speed of travel should increase by how much? @mathmath333

Answer 1

@perl

Answer 2

you can use the equation distance = rate * time

Answer 3

since distance does not change

Answer 4

i got 25%

Answer 5

d = r*t

you are given that you reduce the time by 20%
d = r * ( 1+ k) * t *(1-.2)

since d = d

r*t = r * ( 1 + k ) * t * ( 1 - .2 )

Answer 6

is it 25%

Answer 7

so you can simplify
1 = (1 + k ) ( 1-.2)

Answer 8

I get 25% as well

Answer 9

thanks just confirming, got a few more

Answer 10

did you use similar logic>

Answer 11

ye i made set values