Pertanyaan

Perhatikan gambar! Jika panjang LM = 30 cm dan MY = 12 cm, panjang XY adalah ....

Perhatikan gambar!

Jika panjang LM = 30 cm dan MY = 12 cm, panjang XY adalah ....

30 cm
32 cm
35 cm
38 cm

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Pembahasan

$X Y space equals space fraction numerator left parenthesis N M cross times Y L right parenthesis space plus space left parenthesis K L cross times M Y right parenthesis over denominator L M end fraction space space space space space space space equals space fraction numerator left parenthesis 20 cross times left parenthesis 30 minus 12 right parenthesis right parenthesis space plus space left parenthesis 50 cross times 12 right parenthesis over denominator 30 end fraction space space space space space space space equals space fraction numerator 360 plus 600 over denominator 30 end fraction space space space space space space space equals 960 over 30 space space space space space space space equals 32 space c m$