Question

Four equal-sized maximum circular plates are cut off from a square paper of area $784$ $c{m}^2$ The circumference of each plate is

• A. $22$ cm
• B. $44$ cm
• C. $66$ cm
• D. $88$ cm

Answer 1

The correct option is B $44$ cm

Area of square plate$=784c{m}^2$

Side of square plate$=\sqrt{784}=28cm$

Now, $2\times$ diameter of each circle=side of square

$\Rightarrow 2\times 2r=28cm\Rightarrow r=7cm$

Circumference of circular plate$=2\pi r$

$=2\times \frac{22}{7}\times 7$

$=44c{m}^2$