Mechanical Engineering > GATE 2026 > Numerical Ability
Consider a string P of length l that is laid out as a straight-line segment. Another string K is laid out as a semicircular arc with string P as its diameter, as represented in Figure (i). When both the strings are shortened by a length x they can be re-arranged such that the shortened string K forms a full circle with the shortened string P as its diameter, as represented in Figure (ii). The value of x/l is _______
A
π
B
(π-1)/2π
C
π/2(π-1)
D
π/(π-1)

Correct : c

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