Answer-Pipe ‘A’ and pipe ‘B’, together can fill 20% of a tank in 7 hours while pipe...

Time taken by pipe lsquoArsquo and pipe lsquoBrsquo, together to fill the tank 70.20 35 hours Let the total capacity of tank 280 units Efficiency of pipe A B 28035 8 unitshour Efficiency of pipe lsquoCrsquo 28040 7 unitshour Tank filled by pipe A B in 33 hours 33 times 8 264 units Time taken by all three pipes to fill the remaining tank 280 ndash 2648 ndash 7 16 hrs Total time taken 33 16 49 hours

Question

Pipe ‘A’ and pipe ‘B’,

together can fill 20% of a tank in 7 hours while pipe ‘C’ takes 40 hours to empty it. Pipe ‘A’ and pipe ‘B’ were opened together. After 33 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 40 hours

D 49 hours

E 15 hours

Practice Next

Relevant for Exams:

South Indian Bank Probationary Clerk

Pipe &lsquo;A&rsquo; and pipe &lsquo;B&rsquo;,

Solution

Relevant for Exams:

Pipe ‘A’ and pipe ‘B’,