1.

The ratio of the cost price of a camera to its selling price is\[6:7\]. Sam sold B such cameras at \[Rs.\text{ }210\]each. Find the cost of 8 cameras.

A.  \[Rs.\text{1}290\]                  
B.  \[Rs.\text{144}0\]      
C.    \[Rs.\text{135}0\]      
D.    \[Rs.\text{156}0\]
Answer» C.    \[Rs.\text{135}0\]      


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