shalini has to cut out circles of diameter 5/4 cm from alumunium strip of dimensions 35/4 by 5/4 cm.how many full circles can Shalini cut?also ,calculate the wastage of the aluminium strip.(hint:diameter of one circle =breadth of the rectangular strip = 5/4 cm=5/4 cm. length of the strip =35/4cm=35/4cm : number of full circles which can be cut from the strip =35/4÷5/4=35/4×4/5=7 wastage = area of the strip - total area of the circles )
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Answer:
Circle diameter=5/4 cm
Aluminium strip=35/4 cm by 5/4 cm
Area of Aluminium strip=35/4 cm * 5/4 cm=35*5/ 4*4 cm
=175/16 cm
Area of a circle=3.14 * (5/4)cm square=3.14 * 25/16 cm square=78.5/16 cm square.
175/16 cm square divided by 78.5/16 cm square
=176/16 * 78.5/16 cm square
=175/78.5=2.2296
So Shalini can cut 2 full circles.
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