Question

12. The area of a circle is 154 cm. What is its
circumference ?​

Answer 1

Answer:

the area of circle =πr²

154=22/7 ×r²

r²=154×7/22=49

r=7

circumference=2πr=2×22/7 ×7

=44cm

Answer 2

$\huge\mathfrak\red{Hey Mate}$

$\boxed{ANSWER}$

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GIVEN:

Area of the circle =154 cm^2

Formula for area of circle =

$\pi \: {r}^{2}$

$\pi {r}^{2} = 154 \\ \\ we \: know \: \pi = \frac{22}{7} \\ \\ \frac{22}{7} {r}^{2} = 154 \\ \\ {r}^{2} = \frac{154 \times 7}{22} \\ \\ {r}^{2} = 49 \\ \\ r = 7$

$circumference \: = 2\pi \: r \\ \\ \: \: \: \: \: \: \: = 2 \times \frac{22}{7} \times 7 \\ \\ \\ \: \: \: \: \: \: = 44$

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$<marquee>HOPE IT HELPS$