Three pipes A, B and C can fill a cistern in 8 minutes,12 minutes and 16 minutes respectively. What is the time taken by three pipes to fill the cistern when they are opened together?
Answer & explanation
Correct answer: option 3
The following chart has to be made first:
Efficiency of A = 6
Efficiency of B = 4
Efficiency of C = 3
Efficiency of A + B + C = 13
Thus, all the 3 pipes can fill the cistern in 3.7 minutes = \(\frac{ 48}{13 }\) = 3.7 minutes