Question

If x : y =7 : 9 and y : z = 15 : 7 ,find x : z .​

Answer 1

Step-by-step explanation:

x : y : z

7 : 9

15 : 7

35: 45 : 21

x : z

35: 21

Answer 2

Answer:

$\frac{x}{y} = \frac{7}{9}$

$\frac{y}{z} = \frac{15}{7}$

Multiplying the two relations:

$\frac{x}{y} . \frac{y}{z} = \frac{7}{9} . \frac{15}{7}$

In LHS, y cancels out to give $\frac{x}{z}$ and in RHS, 7 cancels out to give $\frac{15}{9}$

So x/z = 15/9

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