Solution:

Given:
Salary of each worker in the year ending Dec. 31, 2012 = Rs. 1,000
Number of workers = 10

Step 1: Calculate the total salary paid in the year ending Dec. 31, 2012
Total salary = Salary of each worker x Number of workers
Total salary = 1,000 x 10
Total salary = Rs. 10,000

Step 2: Calculate the new salary after the raise of 20% in the year 2013.
New salary = Old salary + (Old salary x Raise percentage)
New salary = 1,000 + (1,000 x 20/100)
New salary = 1,000 + 200
New salary = Rs. 1,200

Step 3: Calculate the total salary paid in the year ending Dec. 31, 2013
Total salary = New salary x Number of workers
Total salary = 1,200 x 10
Total salary = Rs. 12,000

Therefore, the amount of salaries for the year ended 31st Dec. 2013 will be Rs. 12,000.

Explanation:
- The given problem is about calculating the amount of salaries paid by XYZ and Company for the year ending Dec. 31, 2013.
- The problem provides information about the salary paid in the year ending Dec. 31, 2012, which is Rs. 1,000 per month for each of the ten workers employed by the company.
- To calculate the total salary paid in the year ending Dec. 31, 2012, we multiply the salary of each worker by the total number of workers.
- The total salary paid in the year ending Dec. 31, 2012 is Rs. 10,000.
- The problem also mentions that the company raised salaries by 20% at the start of the year 2013.
- To calculate the new salary after the raise, we add the old salary to the product of old salary and raise percentage.
- The new salary after the raise is Rs. 1,200.
- Finally, we calculate the total salary paid in the year ending Dec. 31, 2013, by multiplying the new salary by the total number of workers.
- The total salary paid in the year ending Dec. 31, 2013, is Rs. 12,000.

10 workers = 1000 per month
so,
10*1000=10000
now,
=10000*12(for 12 month)
=120000
again,there is increase in salary so
=120000+20\100
=144000 answer