Question

If 12 inches correspond to 30.48 centimeters, then how many centimeters are there in thirty inches? [1 MARK]

Answer 1

Solution: 1 Mark

Length which are in inch and centimeters are related by direct proportion

Let the required length in cm be c.

$\frac{inches}{centimeters}:\frac{12}{30.48}=\frac{30}{c}$

$\frac{12}{30.48}=\frac{30}{c}$

12c = (30)(30.48)

12c = 914.4

c = 76.2

Hence 30 inches corresponds to 76.2cm.