In a multi plate clutch, number of pairs of contact surfaces (n) = ___

1.	In a multi plate clutch, number of pairs of contact surfaces (n) = _______?
A.	n<sub>1</sub> ‚Äö√Ñ√∂‚àö√ë‚àö¬® n<sub>2</sub> + 1
B.	n<sub>1</sub> ‚Äö√Ñ√∂‚àö√ë‚àö¬® n<sub>2</sub> ‚Äö√Ñ√∂‚àö√ë‚àö¬® 1
C.	n<sub>1</sub> + n<sub>2</sub> ‚Äö√Ñ√∂‚àö√ë‚àö¬® 1
D.	n<sub>1</sub> + n<sub>2</sub> + 1
Answer» D. n<sub>1</sub> + n<sub>2</sub> + 1

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