Data is provided for 3 months for a water tank whose capacity is 900000 L to provide continuous water supply to a colony. Water tank is first completely filled and then it gets completely emptied to supply water in the colony . It supply water continuously to the colony and is refilled again and again to provide continuous supply.. In the colony there are 60 houses in which all houses may or may not be completely occupied in the given three months . June to Each house is filled with a tap form which rate of flow of tankprovides continuous water supply to these tap in the whole month. Julyto In this month 45 houses are occupied and tank gets emptied after4 (1)/(6)days .Rate of flow from one tap is same as June. Augustto Rate of flow of water from the taps is same as of June and gets emptied after supplying water to the colony for 100 hr. Number of houses occupied in August in Q%. In May efficiency of each tap decreases by 20% due to leakage as compared to efficiency of June and capacity of tank is reduced to 80% In how many hours tank willbe emptied in Mayif total occupied housesin May is equal to no. of occupied housesin July .