Question

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Answer 1

Answer:

Circumference = 39.6 cm

We know:

Circumference of a circle = 2πr

⇒39.6 =2×227×r⇒39.6×72×22=r⇒r=6.3 cm

Also,

Area of the circle = πr2

                             =227×6.3×6.3=124.74 cm2Let the radius of the circle be r.

Now,

Area=98.56⇒πr2=98.56⇒227×r2=98.56⇒r=5.6

Now,

Circumference = 2πr=2×227×5.6=35.2 cm

Hence, the circumference of the circle is 35.2 cm