a:b=7:9,b:c=1:5.a:b:c=?
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Answer:
7 : 9 : 45
Step-by-step explanation:
LCM of b's in two ratios
LCM (9,1) = 9
make b's equal to 9
a : b = 7 : 9
a/b = 7×1/9×1 = 7/9
b/c = 1×9/5×9 = 9/45
now ...
a : b = 7 : 9 & b : c = 9 : 45
hence a : b : c = 7 : 9 : 45
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