19.6:X= 1: 10
X= 196
Answer: actual height 196cm.
10 ( 1) 5:8=40:X
X=64
X: three quarters = one fifth: two fifths.
X= three eighths
(3) 1.5:x=3.6:4.8
X=2
(4)x:2=5:2.5
X=4
1 1. Let the height of the model be x.
35:X = 500: 1
X=0.07
answer .......................
Hope to adopt.