Question

40 m - 20 cm = ___ .

• A. 20 m
• B. 20 cm
• C. 3980 cm
• D. 3980 m

Answer 1

The correct option is C 3980 cm

Here, convert 40 m to cm,
From the conversion Table we see that
To convert larger units (m) to smaller units (cm) we multiply by the conversion factor.
We know that 1m = 100 cm
40 m = 40 $\times$ 100 cm
=4000 cm
now, 4,000 cm - 20 cm
= 3980 cm.
Answer: option C. 3,980 cm