Correct option is (B) 55x = 750
Let the number of toys produced on that particular day be x.
Given that the cost of production of each toy was found to be Rs 55.
\(\therefore\) Total cost of production on that day = Rs 55x
(Total cost = Total number of toys \(\times\) the cost of one toy)
Given that on a particular day, the total cost of production was Rs 750.
\(\therefore\) 55x = 750 which represent the given situation.