As shown in the figure, take point A on the
line and draw a half circle P, of radius 0.5 with
A as centre. It intersects given line in point B.
Now taking B as centre draw a half circle P2 of
radius 1 cm which is on the other side of the
line. Now again taking A as centre draw a half
circle P3 of radius 1.5 cm. If we draw half
circles like this having radius 0.5 cm, 1 cm,
1.5 cm, 2 cm, we get a figure of spiral shape.
Find the length of such spiral shaped figureform
ed by 13 such half circles.
( 22 /7)
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