Answer: There are 13 slices when Dario cuts .
Explanation :
Since we have given that
Quantity of parmesan cheese is given by
Quantity of ricotta cheese is given by
Quantity of mozzarella cheese is given by
Now, total quantity of cheese Dario have
Now,
According to question, Dario cuts the lasagna into several equal slices and each containing exactly
So,
Number of slices is given by
Hence, there are 13 slices when Dario cuts .