How much time will the leak take to empty the full cistern?
I.The cistern is normally filled in 9 hours.
II.It takes one hour more than the usual time to fill the cistern because of la leak in the bottom.

A. I alone sufficient while II alone not sufficient to answer
B. II alone sufficient while I alone not sufficient to answer
C. Either I or II alone sufficient to answer
D. Both I and II are not sufficient to answer
E. Both I and II are necessary to answer

• Both I and II are necessary to answer
  
  option:E
• 12 years agoHelpfull: Yes(6) No(3)
• cistern--9hr--xlit.
  cistern--10hr--10x/9.
  ciostern with leak--10hr--xlit.
  leakage--10hr--(10x/9-x).
  leaage--90hr--xlit.
  ans-90hrs,E..
  
  l
• 11 years agoHelpfull: Yes(1) No(0)
• E BOTH 1&2 ARE NECESSARY FOR SOLVE THE PROBLEM
• 11 years agoHelpfull: Yes(0) No(0)
• the answer is E
  both I and II are necassary to answer
• 11 years agoHelpfull: Yes(0) No(0)
• i cannnot help as it justs tel the time to fill without a leak.
  2 alone tells time to fill with a leak as compared to the without leak one but has no figures.
  both considered together can tell the without leak time so both together have to be considered.
  E
• 11 years agoHelpfull: Yes(0) No(1)