Ratio, SM-Bank 053

Oliver's bike is 1.68 metres long in real life.

Calculate the scale used in this scale drawing of Oliver's bike. (2 marks)

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\(1\ :\ 42\)

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\(\text{Scale}\)	\(=\text{Scaled length}\ :\ \text{Actual length}\)
	\(=4\ \text{cm}\ :\ 1.68\ \text{m}\)
	\(=4\ \text{cm}\ :\ 168\ \text{cm}\)
	\(=1\ :\ 42\)