p : l = 3 : 2
p : Y = 3 : 2 (dikalikan silang)
2p = 3Y
p = (3/2)Y
Rumus keliling persegi panjang:
K = 2p + 2l
K = 2.(3/2)Y + 2.Y
K = 3Y + 2Y
K = 5Y
Jawaban: D
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= (3+2)x2
= 5x2
=10Y
p : l = 3 : 2
p : Y = 3 : 2 (dikalikan silang)
2p = 3Y
p = (3/2)Y
Rumus keliling persegi panjang:
K = 2p + 2l
K = 2.(3/2)Y + 2.Y
K = 3Y + 2Y
K = 5Y
Jawaban: D