Question

if a wire is bent into the shape of a square the area of a square will be 49 CM square when the wire is bent into circular shape find the radius of semicircle​

Answer 1

Answer:

$area \: of \: square = side {}^{2} \\ 49 = side {}^{2} \\ side = 7 \\ length \: of \: wire = 4 \times 7 \\ = 28cm \\ length \: of \: wire = circmference \: of \: semi \: circle \\ 28 = \pi \: r \\ r = 28 \div \pi$