Question

If a wire is bent into the shape of a square, the
area of the square is 49 cm². When the wire is
bent into a semi-circular shape, find the radius of the senior circle​

Answer 1

Answer:

your answer is 8.99 cm or 98/11cm

Explanation:

Area of given square= 49cm^2

l^2 = 49

l = 7 cm

total length of wire = 4×l = 4 × 7= 28 cm

if the wire is bent into semicircular shape then, length of wire= circumference of circle/2

28 =(2 × pi × r)/2

28= pi × r

98/11 = r

hence, radius of semi circle is 98/11 = 8.99cm ~ 9cm