How many square of one centimeter side does stamp a cover ?

Dear Student,

Your question appears to be incomplete as you have not provided the diagram of stamp A.

However I am providing you the example :




Consider the stamp A as shown above.

$$\begin{gathered} \mathrm{Each} \mathrm{small} \mathrm{square} \mathrm{has} \mathrm{a} \mathrm{dimension} \mathrm{of} 1 \mathrm{cm} \times 1 \mathrm{cm}. \\ \mathrm{Area} \mathrm{covered} \mathrm{by} \mathrm{stamp} \mathrm{A} = \mathrm{Length} \times \mathrm{breadth} \\ =6 \times 3 \\ =18 \mathrm{square} \mathrm{centimetres}. \end{gathered}$$