If Ram, Shyam and Mohan invested Rs.8000 , Rs.12000 , and Rs.16000 respectively for 2 years, 3 years, and half years. Find the ratio of their profit at the end.

  4  : 9 : 2

                              A               B                  C

Investment ⇒     8000          12000            16000

Inv. Ratio    ⇒         2      :         3       :        4   

Time           ⇒     2 years        3 years        0.5 years  

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Profit Ratio ⇒         4       :         9       :         2 

(*Profit ratio = Inv. ratio × time ratio)