ambass a door
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Better: in robotics, for a helical path with step-by-step, the total path length ≈ \( \sqrt{(\text{linear})^2 + (\text{total circumferential distance})^2} \)
Circumference per turn = \( 2\pi r \), but `r` unknown.
Problem lacks radius.
Revise:
Use pitch and assume unit radius? Not safe.
Alternative idea: perhaps "helicical path" with 4 turns in 2 m linear — but without radius, cannot compute.
Change to:
A robotic arm welds a cylindrical pipe with 6 turns over 1.5 meters. If each turn is 1 meter long along the helix and radius is 0.1 m, compute total path length.
But radius not given.
Better: in standard problems, they assume pitch and compute total helix length assuming radius.