Question

A spiral is made up of successive semicircles, with centres alternately at A and B, starting with centre at A, of radii 0.5 cm, 1.0 cm, 1.5 cm, 2.0 cm, . . . . Length of successive semicircles is l1, l2, l3, l4, . . . with centres at A, B, A, B, . . ., respectively

Answer 1

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