Question

if area of a circle is 154 cm square then find its diameter and cirumference

Answer 1

Area of Circle = pi * r^2
=> 154 = 22/7 * r^2
=> 7*7 = r^2
=> r = 7 cm.
Now,
Diameter of circle = 2r.
=> D = 2*7
=> D = 14 cm.
Then,
Circumference of circle = pi * d
=> C = 22/7 * 14
=> C = 22 * 2
=> C = 44 cm

Hope it helps u......

Answer 2

Hey mate...

Here's your answer..

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$area = 154sqcm \\ so \: \pi \: r {}^{2} = 154 \\ 22 \div 7 \times r {}^{2} = 154 \\ r {}^{2} = 49 \\ r = 7cm \:$
Thus...Diameter=2*7=14cm

And circumference=2*22/7*7=44cm..

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HOPE IT HELPS..

@Rêyaañ11