if a tank a can be filled within 10 hrs and tank B is 1/4th filled in 19 hrs.. then wat is the duration of the tank to fill completely?

• plz read queston carefully
  answer wil be
  19*4=76
  ok
• 13 years agoHelpfull: Yes(19) No(14)
• 21 hours
• 13 years agoHelpfull: Yes(17) No(7)
• 1/4 in 19 th hrs
  1/2 in 20th hrs
  1 in 21th hrs
  
  so,ans is 21 hrs
• 13 years agoHelpfull: Yes(7) No(11)
• let total volume of B=1
  1/4th filled in 19 hrs.
  so,(1-(1/4))=3/4th filled in (19*4*3)/4=57hrs
• 13 years agoHelpfull: Yes(2) No(2)
• let, Total space of B=1
  filled space 1/4th
  empty space 1-1/4=3/4
  1/4th filled in 19hrs
  so, 3/4th filled in (19/4)*(4/3)=6.3hrs
• 13 years agoHelpfull: Yes(1) No(5)