Subject
Quantitative Aptitude
Topic
Unitary Method
Pipe A can fill up a tank in 40 minutes and pipe B can fill up the same tank in 30 minutes, how many minutes will it take for the two pipes together to fill up the tank?
Pipe A can fill up a tank in 40 minutes and pipe B can fill up the same tank in 30 minutes, how many minutes will it take for the two pipes together to fill up the tank?
ক)
10খ)
15গ)
17(1/7)ঘ)
18(4/7)Explanation
pipe A can fill up 1/40 part of the tank in 1 minute pipe B can fill up 1/30 part of tha tank in 1 minute together the can fiil = (1/40 + 1/30) = 7/120 part in 1 minute 7/120 part in 1 minute 1 or full part = 120/7 minute = 17 (1/7) minuteRelated questions
50 men took a dip in a water tank 40m long and 20m broad on a religious day. If the average displacement of water by a man is 4 m3, then the rise in the water level in the tank will be-A water tank can be filled by two pipes A and B in 60 minutes and 40 minutes respectively. How many minutes will it take to fill the tank from empty state if B is used for half the time, and A and B fill it together for the other half?Two pipes A and B can fill a cistern in 37(1/2) minutes and 45 minutes respectively. Both pipes are opened. The cistern will be filled in just half an hour, if the B is turned off after:Susan can type 10 pages in 5 minutes. Mary can type 5 pages in 10 minutes. Working together, how many pages can they type in 30 minutes?A man can do a piece of work in 5 days. But with the help of his son, he can do it in 3 days. In what time can the son do it alone?নৌকা ও স্রোতের বেগ যথাক্রমে ঘন্টায় ১৮ কি.মি. ও ৬ কি.মি। নদী পথে ৭২ কি.মি. অতিক্রম করে পুনরায় ফিরে আসতে কত সময় লাগবে?A certain number of men can finish a piece of work in 100 days. If, there were 10 men less, it would take 10 days more for the work to be finished. How many men were there originally?A pump can fill a tank with water in 2 hours. Because of a leak, it took 2(1/3) hours to fill the tank. The leak can drain all the water of the tank in: