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Cost and length

Cost and length

Secondary 2
4 marks
TGM Original Questions

TGM Original Questions

The cost, \(C\) dollars, of a metal pipe is directly proportional to its length, \(x\) cm. A pipe of length \(30\) cm costs \(\$2\).

  1. Find an equation connecting \(C\) and \(x\).[2]
  2. Find the length, in centimetres, of a pipe that costs \(\$15\).[2]

Solution:

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Answer:(a) \(C=\dfrac{x}{15}\) (b) \(225\text{ cm}\)

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