Question

12. Area of a circular wire is 154 sq. cm. It is moulded into a square. Find the area of the squared wire. please give the answer with explanation​

Answer 1

Answer:

area of circle = pi r square

22upon 7 multiply 154

then cut them

Answer 2

Answer:

plz follow me

Step-by-step explanation:

Area= 154cm²

Area=πr²

Therefore,

154=πr²

=>154x(7/22)=r²

=> 7x7=r²

=>r=7cm

Now circumference of circle will be equal to that of perimeter of square because we r using the same wire of same length.

i.e, perimeter(circle)= perimeter(square)

Therefore,

2πr=4a

2x(22/7)x7=4a

44=4a

a=11

Now we got side of square. So its a easy job to find area of square.

Area of square=a²

11x11=121cm²

Therefore the area of square is 121cm²