The weight of the cast iron bar is 20 kg. How many 18 kg parts can you cast from 10 blanks? How much pig iron will be left?

The solution of the problem.
1) Find the mass of 10 cast iron blanks:
20 * 10 = 200 kg.
2) Let’s find how many parts are 18 kg each. can be cast from 200 kg of blanks:
200: 18 = 11 (rest 2).
This means that 11 parts of 18 kg can be cast out of 10 cast iron blanks, while 2 kg of cast iron will remain.
Answer: 11 parts; 2 kg of cast iron.