The average growth of human hair is 0.5 inch per monthFind how long it takes a human to grow 3 inches of hair?

If the average growth of human hair is 0.5 inches per month, it would take 6 months to grow 3 inches of hair. This is calculated by dividing the total desired growth (3 inches) by the monthly growth rate (0.5 inches). Therefore, 3 inches ÷ 0.5 inches per month = 6 months.