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

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Answer 1 · 2018-03-07T15:28:12

#"14 mm"^2#

#"1 cm = 10 mm"#

Squaring on both the sides

#"1 cm"^2 = "100 mm"^2#

Above equation can also be written as

#1 = "100 mm"^2/"1 cm"^2#

Multiplying a number with #color(blue)( "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#