A rectangular sheet is 28 cm long and 21 cm wide. It is cut into the greatest possible equal squares. What is the total perimeter of all the squares obtained?

Answer: C. 336

Let's solve it step by step.
Question: A rectangular sheet is 28 cm long and 21 cm wide. It is cut into the greatest possible equal squares. What is the total perimeter of all the squares obtained?
Step 1: Find the side of the largest possible square.
We need to divide both 28 cm and 21 cm into equal lengths without leaving any wastage.
Therefore, we find the HCF of 28 and 21.
The HCF =7. 28 divided by 7 = 4 and 21 divided by 7=3 4 x 3=12 squares. Perimeter is 12 x 28 =336

Answering after opening this box earns no Practice Points.