If UR question is √(3.98/9.8),then ur answer will be 2*3.14*0.63== 4.002 ansIf ur question is √3.98/9.8then ur answer will be. 2*3.14*(1.994/9.8)= 2*3.14*0.2034=1.277 ans. CHECK answer ACCORDING to ur question.
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