Jawabanmu

2014-06-10T22:34:20+07:00
Keliling = 2(p+l)
100 = 2p+2l
50 = p+l
p= 50-l

Luas = pxl = (50-l)l
= 50l -l²
f'(x) = 0
50-2l = 0
50 = 2l
l = 25

p = 50-l = 50-25 = 25

luas maksimum = pxl = 25 x 25 = 625 m²
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2014-06-10T22:36:42+07:00
Kel = 2.(p+l)
100 = 2.50
50 = p+l
agar luasnya maksimum panjang=26 dan lebarnya = 24
jadi luasnya = p × l = 26 × 24 = 624

follow my insta: @aretha_belicia
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