am+an= ? = কত?
A
am-n
B
man
C
nam
D
am+n
Correct Answer: am-n
Part of the tank filled by pipe A and B in 2 hours = 2 ( 1/6 + 1/8 ) = 2 {(4 + 3)/24} = 7/12 Remaining part = 1 - 7/12 = 5/12 This part is filled by pipe B. ∴ Required Time = (5/12)x 8 = 10/3 hours