1.

The mass of an aluminium rod varies directly with its length. If a 36 cm long rod has a mass of 432 gm, then find the length of the rod whose mass is 81gm.

A.  3.25 cm        
B.      6.75 cm     
C.  5.00 cm        
D.      5.50 cm
E.  None of these
Answer» C.  5.00 cm        


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