Answer:
35 cm
Explanation:
We are given the scale on a map is:
.
We are also asked to find
such that:
.
So I purposely put
on top because the centimeters were on top in the previous fraction.
I purposely put
on bottom because the kilometers were on bottom in previous fraction.
So this tells us how to setup the proportional that we need to solve which is:

Multiply both sides by 56:

Input left hand side into calculator or do it with your brain:



So the answer is 35 cm.