Question

Which of the following measurement is not in S.I. unit?

• A. $5m$ of cloth
• B. $20seconds$ of time
• C. Surface area of $25c{m}^2$
• D. $2kg$ of block

Answer 1

The correct option is C

Surface area of $25c{m}^2$

S.I. unit of area is $m^2$, but surface area is given in $c{m}^2$.

S.I. unit for time is second, meter for length and kilogram for mass.