Answer-Pipe ‘A’ and pipe ‘B’, together can fill 32% of a tank in 8 hours while pipe...

Time taken by pipe lsquoArsquo and pipe lsquoBrsquo, together to fill the tank 80.32 25 hours Let the total capacity of tank 175 units Efficiency of pipe A B 17525 7 unitshour Efficiency of pipe lsquoCrsquo 17535 5 unitshour Tank filled by pipe A B in 24 hours 24 times 7 168 units Time taken by all three pipes to fill the remaining tank 175 ndash 1687 ndash 5 3.5 hrs Total time taken 24 3.5 27 hours 30 min

Question

Pipe ‘A’ and pipe ‘B’,

together can fill 32% of a tank in 8 hours while pipe ‘C’ takes 35 hours to empty it. Pipe ‘A’ and pipe ‘B’ were opened together. After 24 hours, pipe ‘C’ is also opened. Find the total time taken to fill the empty tank this way.

A 30 hours

B 27 hours 30 min

C 35 hours

D 25 hours

E 15 hours