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Two light rods AB = a + b and CD = a -b symmetrically lying on a horizontal. There are kept intact by two strings AC and BD. The perpendicular distance between rods is a. The length of AC is given by

A

a. `a^2 + b^2`

B

b. `a^2 - b^2`

C

c. `sqrt(a^2-b^2)`

D

d. `sqrt(a^2 + b^2)`

Text Solution

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The correct Answer is:
D
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