Question

Solve: $\frac{z}{z+15}=\frac{4}{9}$

• A. $13$
• B. $19$
• C. $12$
• D. $14$

Answer 1

The correct option is C $12$

Given, $\frac{z}{z+15}=\frac{4}{9}$

On cross multiplying, we get

$\Rightarrow 9z=4(z+15)$

$\Rightarrow 9z=4z+60$

$\Rightarrow 5z=60$

$\Rightarrow z=12$