A nut has been tightened by a force of 180 N using an 8 cm long spanner. What length of

A nut has been tightened by a force of 180 N using an 8 cm long spanner. What length of a spanner is required to loosen the same nut with 150 N?
(a): 11 cm
(b): 8.5 cm
(c): 9.6 cm
(d): 10.9 cm

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