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X:Y=2:3,Y:Z=5:7,find X:Y:Z​

Answer»

ANSWER:

x:y = 2:3

\frac{x}{y} = \frac{2}{3}

x = \frac{2y}{3}

y:z = 5:7

z = \frac{7y}{5}

x:y:z = \frac{2y}{3} :y: \frac{7y}{5}

= \frac{2}{3} \times 15:1 \times 15: \frac{7}{5} \times 15

= 10:15:21


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