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Question

Amita wants to make rectangular cards measuring 8 cm×5 cm. She has a square chart paper of side 60 cm. How many complete cards can she make from this chart? What area of the chart paper will be left?

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Solution

The square chart paper of side 60 cm can be divided in 7 parts each of length 8 cm along one side of the chat paper and in 12 parts of lengths 5 cm along other side of the chart paper.
Number of rectangular cards =7×12=84 cards
Now, Area of the square chart paper
=(60×60)cm2=3600 cm2
Area of the one rectangular card =(5×8)cm2=40 cm2
Area of the 84 rectangular card =84×40 cm2=3360 cm2
Area of remaining chart paper =(36003360)cm2=240 cm2.

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