已知a:b=1/2:2/5,b:c=1.2:0.5求a:b:c

问题描述:

已知a:b=1/2:2/5,b:c=1.2:0.5求a:b:c

a:b=1/2:2/5=5:4=15:12
b:c=1.2:0.5=12:5
a:b:c=15:12:5