Question

The circumference of two circles are in the ratio 9:16. Find the ratio of their areas

Answer 1

C1:C2

C1=2πr
9=2×22/7×r
63/44=r

C2=2πr
16=2×22/7×r
16×7/44=r
112/44=r
28/11=r

Area of C1=πr²
=22/7×63²/44²
=87318/13552
=6.44

Area of C²=πr²
=22/7×28²/11¹
=17248/847
=20.36

Ratio

6.44 : 20.36

Answer 2

Step-by-step explanation:

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