Question

Sabendo que a soma de a+b+c=120m. Preciso da conta, valendo 18 pontos.

Answer 1

20/a = 20+24+36/120
20/a = 80/120
20/a = 8/12
20 . 12 = 8 . a
240 = 8 . a
a = 240/8
a = 30 cm

20/30 = 24/b
20 . b = 30 . 24
20 . b = 720
b = 720/20
b = 72/2
b = 36 cm

20/30 = 36/c
20 . c = 30 . 36
20 . c = 1080
c = 1080/20
c = 108/2
c = 54 cm