Question

4. The ratio of copper and zinc in brass is 11:6. How much zinc is there in each of the following:
a)x:12: :7:2
b) 42:12: :7:X​

Answer 1

Step-by-step explanation:

To solve this I would think of the proportion as defining a “CHUNK” of brass whose total mass is the sum of the proportion values of the constituents. I.e. in every 20 kg CHUNK of brass there are 13 kg of Copper and 7 kg of zinc. Now how many of chunks do you have. Well, you have 100 kg of brass and each chunk is 20 kg, so by simple division you must have 5 chunks. How much zinc do you have ?

5 chunks × 7 kg zinc per chunk = 35 kg Zinc.

Answer 2

Answer:

B 42:12:7:× ok this is the answer ok I think this will help you dear