Question

If the circumfrence of a circular sheet is 154 m , find its radius also find the area of the sheet.

Answer 1

Answer:

The answer will be 24.5cm.

Step-by-step explanation:

Its given that;

circumference = 154cm

We know that, circumference of a circle is given by;

= 2πr

where, r = radius

Thus radius equals;

=2πr = 154

= 2 × 22/7 × r = 154

= 44/7 × r = 154

= r = 154 × 7/44

= r = 49/2 = 24.5 cm

That's all.

Answer 2

Step-by-step explanation:

cumference of circle = 2πr

154=2πr

$\frac{154}{2\pi} = r$

Area of circle = πr²

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: = \pi( { \frac{154}{2\pi} )}^{2}$

$\: \: \: \: \: \: \: \: \: \: \: \: = \pi \times \frac{154}{2\pi} \times \frac{154}{2\pi}$

$\: \: \: \: \: \: \: \: \: \: \: = \frac{23716}{4\pi}$

putting the value of π=22/7

$\: \: \: \: \: \: \: \: \: \: = \frac{5929}{22} \times 7$

= 1886.5 m²

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