Question

the circumference of a circle is 31.4 cm find its radius if π is equals to 22 by 7​

Answer 1

Answer:

Circumference= 2πr

31.4. = 2×22/7×r

r. =31.4×7/44

radius. = 4.99cm (5cm approx.)

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Answer 2

Answer:

Hence the value of the radius of a circle is 4.99 cm.

Step-by-step explanation:

As per the data provided in the given question.

The given data is as follows,

The circumference of a circle (C) is 31.4 cm and the value of $\pi$ is $\frac{22}{7} .$

We have to find the value of radius (r).

Here we will be using the formula of the circumference of a circle.

$C=2\pi r$

Now we will substitute the value $\pi$ and C in the above formula.

$31.4=2\times\frac{22}{7}\times r$

Now we will multiply 22 into 2 we get 44

$31.4=\frac{44}{7}\times r$

Now we will shift the denominator 7 of RHS to the numerator of LHS and the output sign will be positive.

Further, we get

$31.4\times7=44\times r$

Now we will multiply 31.4 into 7 we get,

$219.8=44\times r$

Now we will shift the numerator 44 of RHS to the denominator of LHS and the output sign will be positive.

$\frac{219.8}{44}=r$

Now we will divide 219.8 by 44

Further, we get

[tex]4.99=r\\ r=4.99\;cm[/tex]

Hence the value of the radius of a circle is 4.99 cm.