The correct option is
A 4,872 L
Amount of milk production in a day
= 87 L
We have to find the milk production in 8 weeks.
Now, we can observe:
∴ Amount of milk produced in 56 days
will be = (87×56 L)
Let us solve this using lattice algorithm method.
So, we first make a table of 2 columns and 2 rows because both 87 and 56 are 2-digit numbers.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1195991/original_612810_2.png)
After making the table, we extend the diagonals and write 8 and 7 at the top of each column and 5 and 6 against each row.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1299096/original_lattice3.PNG)
Now, we multiply the digits in the corresponding rows and columns and write them on each side of the diagonal line.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1299180/original_lattice_5.PNG)
At last, we add all the digits diagonally. If the summation becomes more than 1 digit, we regroup other digits with the next diagonal to the left.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1299193/original_lattice_6.PNG)
Let us write the digits from left to right, which gives the final answer as 4,872.
Hence, 4,872 L of milk is produced in 8 weeks.