Question

if a:b=3:7and b:c9:5 then abc​

Answer 1

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Answer 2

Answer:

$\frac{a}{b} = \frac{3}{7} \\ = > 7a = 3b \\ = > a = \frac{3}{7} b \\ \frac{b}{c} = \frac{9}{5} \\ = > 5b = 9c \\ = > c = \frac{5}{9} b \\ abc = \frac{3}{7} :\: \: \: 1 :\: \: \: \frac{5}{9}$

3x9/7x9:63/63:5x7/9x7

=27:63:35