Answer
$350$ tiles
Work Step by Step
Each triangle has a base of $2$ cm and a height of $2+3=5$ cm .
Thus, the area of each triangle is $A=\frac{1}{2}\times2\times5 cm^{2}$
Since, the mural is $1750cm^2$, the number of tiles is $\frac{1750}{5}=350$
