Jawabanmu

2014-03-26T20:46:07+07:00
P:L = 5: 3
L =735

P.L = 735
5x.3x = 735
15x*2 = 735
x*2 = 49
x=7

Keliling = 2(p+l)
keliling = 2(5x+3x)
keliling = 2 (8x)
keliling = 16x
keliling = 16.7
keliling = 112 cm
2014-03-26T20:47:58+07:00
 \frac{p}{l} =  \frac{5}{3}  \\  p =  \frac{5}{3}l \\ L = p.l  \\ 735 =  \frac{5}{3}l.l  \\ l^{2} = 441  \\ l = 21
p =  \frac{5}{3}.21 = 35

K = 2(p + l) = 2 (35 + 21) = 2 (56) = 112 cm
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