Question

the following figure shows a square cardboard ABCD of side 28cm.Four identical circles of largest possible size are cut from this card as shown above.Gind the area of the remaining cardboard

Answer 1

Area of square =a2
Area =(28*28)=784cm2
half of side of square =diameter of circle
diameter of one circle =14cm
radius =d/2=14/2=7cm
Area of one circle =22/7*r2
Area =22/7*(7*7)
Area =22/7*49
Area =22*7=154cm2
Area of 4 circles =4*154=616cm2
Area of remaining portion =784-616
Area of remaining portion 168cm2

Answer 2

Answer:

a^2-4×22/7×7×7

(28)^2-4×22/7×7×7

784-88×7

784-616

108cm^2

Step-by-step explanation:

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