A steel-tape gives correct measurement at $20^{\circ} \mathrm{C}$. A piece of wood is being measured

Question

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

Professor PC Thomas Classes · Answer

\The tape gives correct reading at $20^{\circ} \mathrm{C}$. At $0^{\circ} \mathrm{C}$ the measured length will be less than the correct length namely 25 cm .\