a wire is in the form of square whose side measure is 9 cm. It is stra

1.	a wire is in the form of square whose side measure is 9 cm. It is straightened and bent into a form of a semicircle find the radius of the semicircle formed
Answer» LENGTH of wire is in the FORM of semicircle. Given, length of wire =36 cm Length of the wire = 2 1 (2πr)+2r ⇒36=(π+2)R ⇒36=( 7 22 +2)r= 7 36 .r ⇒r=7 cm

a wire is in the form of square whose side measure is 9 cm. It is straightened and bent into a form of a semicircle find the radius of the semicircle formed

Answer»

LENGTH of wire is in the FORM of semicircle.

Given, length of wire =36 cm

Length of the wire =

(2πr)+2r

⇒36=(π+2)R

⇒36=(

+2)r=

⇒r=7 cm