According to the latest social media research, the rate on which the number of share of a particular Facebook article change is directly proportional to the square root of the number of share an...

Extracted text: According to the latest social media research, the rate on which the number of share of a particular Facebook article change is directly proportional to the square root of the number of share an article have for any given time. Suppose you post an article based on the recent typhoon Rolly and 10 of your friends immediately share it and after 10 minutes the number of share reach 20. How long it will take before you reach 73 number of shares?