There is a cuboidal tank containing some methyl alcohol which evaporates at a constant rate (in litres per minute). If twelve identical pipes start pumping methyl alcohol into the tank, the tank will get filled in 96 minutes. Instead, if 14 such pipes are used, the tank will get filled in 72 minutes. How many such pipes would be required, if the tank needs to be filled in 48 minutes?Guys pls post ur approach !!!

1) 15
2) 16
3) 18
4) 20
5) 21

• 18 pipes are reqd..
  I shall give sol later.
  let others try.
• 12 years agoHelpfull: Yes(1) No(2)