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lebar = 2/4 x 5 = 2,5
p : l : t
6m : 5m : 4m
ukurab bak penampungan
p : l : t
x : y : 2 m
karena sebangun, maka punya perbandingan sisi yg sama
t : t
4m : 2 m
2 : 1
L : L
5 : 2,5
2 : 1
P : P
6 : 3
2 : 1
maka ukuran bak
P = 3 m
L = 2,5 m