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Semonga membantu .... :)4/7 = a/(a + 30)
7a = 4a + 120
3a = 120
a = 40 cm
15/27 = 30/(30 + b)
5/9 = 30/(30 + b)
1/9 = 6/(30 + b)
54 = 30 + b
b =24 cm
20/35 = c/60
4/7 =c / 60
c=240 : 7
c=34,29 cm
15/27 = 60/d
5/9 = 60/d
1/9 = 12/d
d=108 cm