The cost $\$C$ of a metal pipe is directly proportional to its length $x$ cm. When the length is

Question

The cost $\$C$ of a metal pipe is directly proportional to its length $x$ cm. When the length is $30$ cm, its cost is $\$2$. Find an equation connecting $C$ and $x$. Find the length of a metal pipe if its cost is $\$15$.

Accepted Answer

(a) $C = \frac{x}{15}$, (b) $x = 225$ cm

Finding Equation of Direct Proportions

Finding Equation of Direct Proportions

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