Please answer this question 9
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l : m =1 1/2 : 1 3/4
l : m = 3/2 : 7/4
l : m = 6/4 : 7/4
l : m = 6 : 7
l : m = 6×5 : 7×5
l : m = 30 : 35
m : n = 2 1/3 : 4 1/5
m : n = 7/3 : 21/5
m : n = 35/15 : 63/15
m : n = 35 : 63
l:n=30:63
l:n =10:21
Hence, l : m : n = 30 : 35 : 63
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