Question

find the circumference of a circle if area is 2464cm2.​

Answer 1

Answer:

$circumfernce \: of \: circle = 2\pi \times r \ \\ area \: of \: circle = \pi \times r { }^{2} \\ 2464 = 22 \div 7 \times r \times r \\ 2464 \times 7 \div 22 = r ^{2} \\ 112 \times 7 = r {}^{2} \\ r { }^{2} = 784 \\ r = 28 \\ cirumfernce \: of \:c ircle = 2\pi \times r \\ = 2 \times 22 \div 7 \times 28 \\ = 176$