find total number of revolution of circleA?(Answer is not 3)

Asked by abinash.gupta003 | 20th Dec, 2017, 05:33: PM

Expert Answer:

begin mathsize 16px style If space circle space straight A space rolls space around space circle space straight B space it space will space be space straight a space circle space with space radius space open parentheses straight r plus straight r over 3 close parentheses equals fraction numerator 4 straight r over denominator 3 end fraction
Number space of space revolution equals fraction numerator Circumference space of space straight a space circle space with space radius space fraction numerator 4 straight r over denominator 3 end fraction over denominator Circumference space of space straight a space circle space straight A end fraction
straight n equals fraction numerator 2 straight pi cross times fraction numerator 4 straight r over denominator 3 end fraction over denominator 2 straight pi begin display style straight r over 3 end style end fraction equals 4
end style

Answered by Sneha shidid | 21st Dec, 2017, 09:34: AM