Answer:
1 inch = 2.54cm
You are given 10cm wide and 60 inches wide, so you have to convert either the 60 inches or the 10cm to a similar unit to figure out the scale factor. I will convert the 60 inches.
60 x 2.54 = 152.4cm
152.4/ 10 = 15.24 -> Scale Factor
I don't know what you were supposed to work out, but here's some stuff I've worked out for you.
