WBCS Mains 2021 (Held On May 2022) Official Paper-VI

Quartz : Radio :: Gypsum : ?

The value of

is:

If $A$ and $B$ complete a job working together in $20\text{ days}$, $B$ and $C$ together in $15\text{ days}$, and $C$ and $A$ in $12\text{ days}$, then all three working together will be able to complete the same job in:

The number of multiples of $4$ between $10$ and $250$ is:

Total price of $6$ shirts and $7$ trousers is $\text{Rs. }4,130$ while that of $4$ shirts and $9$ trousers is $\text{Rs. }4,270$. Find out the price of $3$ shirts.