Sita has to cutout circles of diameter 1 1/4 cm from an aluminium strip of dimension 8 3/4 by 1 1/4 cm.how many full circles can sita cut? also calculate the wastage of the aluminium strip.
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Circle diameter = 1 1/4 cm
Aluminum strip = 8 3/4 cm by
1 1/4 cm
Area of Aluminum strip = 35/4 cm * 5/4 cm = 35*5 / 4*4 = 175/16 cm²
Area of circle = 3.14 * (5/4cm)² = 3.14 * 25/16 cm² = 78.5/16 cm²
175/16 cm² ÷ 78.5/16 cm² = 175/16 * 16/78.5 = 175/78.5 = 2 18/78.5
Shalini can cut 2 full circles.
Aluminum strip = 8 3/4 cm by
1 1/4 cm
Area of Aluminum strip = 35/4 cm * 5/4 cm = 35*5 / 4*4 = 175/16 cm²
Area of circle = 3.14 * (5/4cm)² = 3.14 * 25/16 cm² = 78.5/16 cm²
175/16 cm² ÷ 78.5/16 cm² = 175/16 * 16/78.5 = 175/78.5 = 2 18/78.5
Shalini can cut 2 full circles.
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