22. Ir a wire is bent into the shape of a square, the area of the square is 49 cm. When the wire is bent into a semi-circular shape, find the radius 22 7 쪽 the semi-circle Take. here anyone is genius that can scolve question
Answers
Answered by
0
Answer:
Area of square = 49 cm
a^2 = 49
a= 7 cm
Side of square = 7 cm
Perimeter of square = Perimeter of semi circle
Perimeter of semi circle = 4* 7 = 28 cm
pi * r + 2r = 28
=> r (2+ pi) = 28
=> r (2+22/7) = 28
=> r (36/7) = 28
=> r = 28 * 7/36
=> r = 7*7/9
=> r = 49/9 cm
Radius of semi circle = 49/9
= 5.44 cm
Similar questions