Monday, April 6, 2015

#Solve #Puzzle

Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. The number of hours taken by C alone to fill the tank is:
A.      10    
B.      12
C.      14    
D.      16