12 children take 16 days to complete a work which can be completed by eight adults in twelve days. 16 adults started working and after three days ten adults left and four children joined them. How many days will they take to complete the remaining work
Correct Answer : D
Two pipes can fill a tank in 4 hr and 5 hr respectively. If they are turned on alternatively for 1 hr each, the tank will be filled in
A cistern can be filled by a tap in 4 hours while it can be emptied by another tap in 9 hours.If both the taps are opened simultaneously,then after how much time will the cistern get filled?
A and B can complete a work in 15 days and 10 days respectively.They started doing the work together but after 2days B had to leave and A alone completed the remaining work.The whole work is completed in: