Question

The dimensions of an oil tin are $26cm\times 26cm\times 45cm$. Find the area of the tin sheet required for making $20$ such that tins. If $1sqm$ of the tin sheet cost $Rs.10$, find the cost of tin used for these $20$ tins.

Answer 1

Area of tin required for sheet

$=2\left[26\times 26+26\times 45+26\times 45\right]$

Area of tin sheet required for making $20$ sheets $=20\times 2\left[26\times 26+26\times 45+26\times 45\right]$

$\begin{array}{c}=120640c{m}^2\\ =\frac{120640}{100\times 100}{m}^2\end{array}$

Cost of tin used for $20$ tins

$\begin{array}{c}=\frac{120640}{100\times 100}\times 10\\ =\frac{12064}{100}\\ =Rs.120.64\end{array}$