Question

A steel tape gives correct measurement at ${20}^o$C. A piece of wood is being measured with the steel tape at $0^o$C. The reading is $25$cm on the tape, the real length of the given piece of wood must be?

• A. $25$ cm
• B. $<25$ cm
• C. $>25$ cm
• D. Can not say

Answer 1

The correct option is B $<25$ cm

Since temperature is decreased, length of the steel tape will decrease.

So whatever we will measure will show more than the a actual length.

So the real length of wood must be less than $25$cm

Answer B: