# A block has a surface area of 0.14 cm2. What is its surface area in mm2?

Mar 7, 2018

${\text{14 mm}}^{2}$

#### Explanation:

$\text{1 cm = 10 mm}$

Squaring on both the sides

${\text{1 cm"^2 = "100 mm}}^{2}$

Above equation can also be written as

$1 = {\text{100 mm"^2/"1 cm}}^{2}$

Multiplying a number with $\textcolor{b l u e}{{\text{100 mm"^2/"1 cm}}^{2}}$ is equivalent to multiplying it with $1$.

Therefore,

0.14 cancel("cm"^2) × ("100 mm"^2)/(1 cancel("cm"^2)) = "14 mm"^2