Question

A one metre long rope has been bent in the form of a circle.the area of this circle thus formed (in cm^2)

Answer 1

this your answer nice question

Answer 2

Given

A one metre long rope has been bent in the form of a circle.

Find out  area of this circle thus formed (in cm^2)

To proof

As given

A one metre long rope has been bent in the form of a circle thus it becomes the perimeter of the circle.

Formula

$Perimeter\ of\ circle = 2 \pi r$

where r = radius

1m =100cm

$100 =2 \pi r$

As

$\pi = 3.14$

put in the above formula

100 = 2 × 3.14 × r

$r = \frac{100}{6.28}$

r = 15.9cm( approx )

Formula

$Area\ of\ circle = \pi r^{2}$

put the value

$= 3.14\times15.9\times15.9$

solve

= 793.82 cm²( approx)

Hence proved