Question

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

Answer 1

Let ABCD be square chart of side 60 cm. Now if we cut along AB then we can cut 12 rectangular cards.

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Answer 2

Given data : Amita wants to make rectangular cards measuring 8 cm x 5 cm. She has a square chart paper of side 60cm.

Solution : a/c to question;

Let, length of rectangular card is 8 cm and breadth is 5 cm.

Now, we need to find out area of the rectangular card, so we use formula of area of rectangle.

Formula : area of rectangle = length * breadth

⟹ Area of the card = length * breadth

⟹ Area of the card = 8 * 5

⟹ Area of the card = 40 cm²

Now, a/c to given,

Length of side of the square chart paper is 60 cm.

{similarly} we need to find out area of the quare chart paper, so we use formula of area of square.

Formula : Area of square = (side)²

⟹ Area of the chart paper = (side)²

⟹ Area of the chart paper = (60)²

⟹ Area of the chart paper = 3600 cm²

Now,

⟹ Number cards = Area of the chart paper/Area of the card

⟹ Number cards = 3600/40

⟹ Number cards = 90 cards ----{1}

From {1}

Answer : Amita can make 90 cards out of chart paper and zero area of the chart paper will be left. {no area of the chart paper will be left.}

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