Given: A person takes a break of 1 hour after every 4 hours working Calculation: According to the question In a period of 5 hours, he works for 4 hours and he takes 1 hour break So, in 20 hours he will work for 16 hours and take 4 hours break And the last 4 hours he will work So, Total working time = 16 + 4 = 20 hours And the total time of break = 4 hours So, The required ratio = 20 : 4 = 5 : 1