Question

Find the area of circle whose circumference is 154 m. Also find diameter of the circle

Please help me​

Answer 1

$circumference = 2\pi \: r \\ 154 = 2\pi \: r \\ 154 = 2 \times 3.14 \times r \\ 154 = 6.28 \times r \\ \frac{154}{6.28} = r \\ \\ r = 24.5 \: m$

$area \: = \pi {r}^{2} \\ area \: = 3.14 \times {(24.5)}^{2} \\ area = 3.14 \times 600.25 \\ area = 1884. 7 \: {m}^{2}$

$diameter \: = 2r \\ diameter = 2 \times 24.5 \\ diameter = 49 \: m$

Answer 2

Step-by-step explanation:

circumference=2πr

154=2πr

154=2×3.14×r

154=6.28×r

6.28

154

=r

r=24.5m

\begin{gathered}area \: = \pi {r}^{2} \\ area \: = 3.14 \times {(24.5)}^{2} \\ area = 3.14 \times 600.25 \\ area = 1884. 7 \: {m}^{2} \\ \end{gathered}

area=πr

2

area=3.14×(24.5)

2

area=3.14×600.25

area=1884.7m

2

\begin{gathered}diameter \: = 2r \\ diameter = 2 \times 24.5 \\ diameter = 49 \: m\end{gathered}

diameter=2r

diameter=2×24.5

diameter=49m

$.$

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