Question

10 cm 5 mm = _____ m

• A. 0.105
• B. 10.5
• C. 1.05
• D. 0.0105

Answer 1

The correct option is A

0.105

We first convert 10 cm 5 mm to millimetres.

1 cm = 10 mm.

$\therefore$ 10 cm = 10$\times$ 10 mm = 100 mm

$\therefore$ 10 cm 5 mm = 100 mm + 5 mm
= 105 mm

We now convert millimetres to metres.

1 m = 1000 mm.

$\therefore$ 1 mm = $\frac{1}{1000}$ m

$\therefore$ 105 mm = 105$\times \frac{1}{1000}$ m= 0.105 m