Answer:
Let ABCD be a square chart of side 60 cm. We have to cut out rectangular cards measuring \[8\,cm\times ~5\,cm\] out of this chart. Now, if we cut chart along AB as shown in figure, then we can cut 12 rectangular cards from one row. Similarly, we can cut 7 rows with 12 rectangular cards in each Area of cut outs of rectangular cards \[=7\times 12\] Number of cards made = 84 cards The left part of square chart is of dimensions \[4\text{ }cm\times 60\text{ }cm\]. Now, area of the left part \[=4\times 60\] \[=Rs.\text{ }240\text{ }c{{m}^{2}}\]
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