Question

A circle of 60 mm diameter rolls
the circlerference of another circle of 180 mm diameter and
outside it trace the locus of point on the circumference of rolling circle for one complete revolution
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Answer 1

Step-by-step explanation:

circumference of smaller circle = 2πr

= 2 × 60/2 π

= 2× 30π

= 60π

circumference of bigger circle = 2πr

= 2 × 180/2 π

= 2 × 90 π

= 180π

Revolution = 180π / 60π

= 3 revolution.. ANSWER

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