# Find the cost of painting 15 cuboids of dimensions 16 cm x 12 cm x 8 cm at the rate of 250 per mÂ².

$\begin{array}{l}\text{Given,}\\ \text{Number of cuboid}=15\\ \text{Rate for painting}\left(r\right)=250\ per\ m^2=250\times10^{-4}\ per\ cm^2\\ \text{Dimesion of cuboid}=16\ cm\ \times12\ cm\ \times8\ cm\\ \text{Area of cuboid}\left(A\right)=2\left(lb+bh+hl\right)=2\left(16\cdot12+12\cdot8+16\cdot8\right)=832\ cm^2\\ \text{Cost of painting}=\text{number of cube}\times A\times r\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ =15\times832\ cm^2\times250\times10^{-4}\ Rs=312\ Rs\end{array}$

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