Question

find the radius of a circle whose area is 1.54km

Answer 1

area of circle=
$\pi \: {r}^{2}$
1.54 = 22/7× r^2
1.54×7/22= radius ^2
154×7/100×22= r^2
radius ^2= 0.49km
r=_/0.49
r = 0.7 km
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Answer 2

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