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Step-by-step explanation:
1. R=7cm...
D=2×R
=2×7
=14...
C=2 pie r
=2×22÷7×7
=44cm..
2.C=616
=2 pie r
616=2×3.14×r
616=6.28×r
616÷6.28=r
98=r
..R=98cm
D=2×R
=2×98
=196cm..
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