20
Q:
A) 6 min | B) 8 min |
C) 12 min | D) 10 min |
Answer: C) 12 min
Explanation:
Explanation:
Let pipe A takes p min to fill
Then,
pipe B takes 3p min to fill
=> 3p - p = 32
=> p = 16 min => 3p = 48 min
Required, both pipes to fill = (48 x 16)/(48 + 16) min = 12 min.