Question

If square sheet of area 3.14 $c{m}^2$ is shaped into circular sheet, then find the estimated circumference of that sheet for nearset hundredth (use pi=3.14)

• A. 6.28 cm
• B. 3.28 cm
• C. 7.84 cm
• D. 4.28 cm

Answer 1

The correct option is A 6.28 cm

Since the square sheet is shaped into circular sheet,
Area of circle = Area of square sheet
$⟹\pi \times r^2=3.14$
$⟹3.14\times r^2=3.14$
$⟹r^2=1$
$⟹r=\sqrt{1}=1$

$\text{∴ Circumference of circle =}2\pi r$
$=2\times 3.14\times 1$
$=6.28cm$