The person can fil 1022 documents in 420 minutes
Variantion and constants
According to the question, we are told that a clerk can file 109 documents in half an hour and thirty minutes that is:
109 document = 45 mins
In order to determine the number of documents to file in 420 mins, we will have:
x = 420 mins
Take the ratio
109/x = 45/420
45x = 4360
x = 1022 documant
This means that the person can fil 1022 documents in 420 minutes
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