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Answer: The width of each flag = 12 cm
The average amount of time it takes Sandra to make each flag = 20 minutes.
Step-by-step explanation:
Given: The ratio of the length to the width the official german flag is 5:3.
Let length = 5x, width = 3x
Length of each flag = 20 cm
i.e.
Then width of each flag = 3 x 4 = 12 cm
i.e. width of each flag = 12 cm
Total time to make 12 flags = 4 hours
Time taken to make 1 flag = hour
Time taken to make 1 flag = hour
1 hour = 60 minutes
Time taken to make 1 flag = minutes = 20 minutes.
Hence, the average amount of time it takes Sandra to make each flag = 20 minutes.