Question
According to the "World Population Prospects 2024" study
by the United Nations, what is the projected peak population of the world in the mid-1980s?Solution
The United Nations' "World Population Prospects 2024" study projects that the world's population will peak at about 10.3 billion in the mid-1980s, influenced by lower birth rates in populous countries like China.
Pipes 'X' and 'Y' can fill a tank in 30 minutes and 45 minutes respectively. Both are opened together. After the tank is half full, a leak develops whic...
Pipes X, Y, and Z can fill a tank in 12 hours, 6 hours, and 8 hours respectively. If the efficiencies of pipes X and Y are each reduced by 50% of their ...
Pipe A can fill a tank in 12 hours, and Pipe B can fill it in 18 hours. Pipe C can empty the full tank in 36 hours. If all three pipes are opened togeth...
Pipe 'A' alone takes 15 minutes to fill half of the tank. Pipe 'B' is 4 times as efficient as pipe 'A'. Find the percentage of the tank filled by both i...
Pipe A and B can fill the pool in 36 minutes and 48 minutes, respectively. Pipe C can empty half filled pool in 36 minutes. If all the pipes are opened ...
- A pipe can fill a tank in 36 minutes while another pipe can drain the full tank in 48 minutes. Calculate how much time both pipes working together will tak...
Time taken by pipe 'A' to fill a tank is 30 minutes. When both pipes 'A' and 'B' are opened together, the tank gets filled in 10 minutes. Find the time...
Pipe ‘A’ can fill a tank in 20 hours while pipe ‘B’ takes 30 hours to empty it. Pipe ‘A’ is opened alone when the tank was empty and after 1...
Pipe ‘A’ and pipe ‘B’, together can fill 20% of a tank in 4 hours while pipe ‘C’ takes 25 hours to empty it. ...
Two inlet pipes M and N alone can fill a tank in 10 hours and 12 hours respectively and an outlet pipe P alone can empty the whole tank in 5 hours. Firs...
Relevant for Exams:
