How many blocks are required to make the toy? A pyramid shaped toy is made by tightly placing cubic blocks of $1\times 1\times 1 cm^3$.The base of the toy is a square $4\times 4cm^2$. The width of each step is $0.5cm $.how many blocks are required to make the toy?
Let the number of blocks required be $x$ .then $x.1=4\times 4\times 0.5\implies x=8$
but the answer is $30$.Please help


Number of Cubic block required for $4\times 4$ =$16$.  Similarly  Number of Cubic block required for $3\times 3$ =9 and 4 and 1 respectively .
Total= $16+9+4+1=30$
