There are two tanks a and b. A drains water with 6L/m and b drains water with 8L/m. A starts drain water at 9:00 and after 2 minute, b starts draining of water. At what time, both with have same level.

a. 9:12
b. 9:10
c. 9:08
d. 9:04

• A =>
  9:01 --- 6 L
  9:02 --- 12 L
  from 9:03 onwards --------18,24,30,36,42,48,54,60
  
  B =>
  from 9:03 onwards -------- 8,16,24,32,40,48,56,64
  
  at 9:08 both A & B have same level (48 L)
  
  3. 9:08
• 10 years agoHelpfull: Yes(86) No(5)
• Ans : 9:08 (3)
  
  Let "x" be the no. of minutes tank "a" take to drain...
  Then tank "b" ll take "(x -2)" minutes
  
  x * 6 = (x - 2) * 8
  x = 8
  
  So at d 8th minute both tanks ll have same level
  
  So option (3) 9 : 08 [since it started at 9:00 ]
• 10 years agoHelpfull: Yes(49) No(0)
• 9:08
  
  Before 9:02
  A drained 2*6 = 12L
  B drained 0L
  
  After n minutes let both of them have same level
  
  12 + 6n = 8n
  2n = 12
  n= 6
  
  Time = 9:02 + 6 min = 9:08
• 10 years agoHelpfull: Yes(27) No(1)
• 6x=8(x-2)
  which is 8
  thus at 9:08 both will be at the same level
• 9 years agoHelpfull: Yes(4) No(0)
• The water level will be same at the lcm of 6 and 8 ie 48 ltrs. After 8 mints of draining of a, it will be 48 ltrs.so the Time will be 9.08. Ans
• 9 years agoHelpfull: Yes(1) No(2)
• let after t minutes levels are equal
  6t=8(t-2)
  t=8 minutes
  time=9:08 [3]
• 9 years agoHelpfull: Yes(1) No(0)
• A starts draining at 9:00, after two minutes that is at 9:02 A would have drained 12 liters,at 9:02 B stars draining and we have to equate the amount of water drained so
  
  Suppose it takes x minutes after 9:02 to drain equal amount of water,so
  
  12+6x=8x
  => x=6
  so the ans. will be 9:02 hr + 6 minutes
  =>9:08
• 10 years agoHelpfull: Yes(0) No(0)
• ans 3.9:08
  let a can drain water at time t minutes
  so according to the question 6*t=8(t-2) or 2t=16 or t=8
  So the time is 9 past 8 minutes
  so answer is 9:08(option 3)
• 10 years agoHelpfull: Yes(0) No(0)
• answer is option 3 as 12+6x=8x which gives x=6 now 6+2=8 therefore time is 9:08
  
• 10 years agoHelpfull: Yes(0) No(0)
• Total drainage in 1 min when both A and B start simultaneously:(8-6)L/m=2L/m
  It has been mentioned that A start @ 9:00 and work for 2 min
  9:01=6L
  9:02=12L
  After this both start working and total drainage is 2L/m
  To complete 12L time required=12/2=6m
  6+2 (of A)=8
  So the time is: 9:08
  
• 10 years agoHelpfull: Yes(0) No(0)
• 3) 9:08
  48
  1 2 4 5 6 7 8
  12 18 24 30 36 42 48
  0 8 16 24 32 40 48
  
• 10 years agoHelpfull: Yes(0) No(0)
• in 2 minutes a drains 12L after 2 minutes b starts drains and its rate is 8L/m.hence after 6 minutes both with have same level means in 8minutes a drains 48L and b drains 48L in 6 minutes.hence both of them at same level at 9:08.
• 10 years agoHelpfull: Yes(0) No(0)
• a -> 6L/m
  In 2 min , 12L will be drained out.
  b -> 8L/m
  At 9:04 ,
  a-> 24L
  b-> 16L
  at 9:08 ,
  a->48L
  b->48L
  
  option c
• 10 years agoHelpfull: Yes(0) No(0)
• 9:08.go through options
• 10 years agoHelpfull: Yes(0) No(0)
• step=20+10*e=10+20*e
  e=1
  speed =1 step/minute
  step=30
  
  
• 9 years agoHelpfull: Yes(0) No(0)
• see here the ratio between the drain water speeds are in ratio of 6:8 so here to make them equal we need time in the ratio of 8:6. which can be got by using option 3 which is 9:08
• 9 years agoHelpfull: Yes(0) No(0)
• A =>
  9:01 --- 6 L
  9:02 --- 12 L
  from 9:03 onwards --------18,24,30,36,42,48,54,60
  
  B =>
  from 9:03 onwards -------- 8,16,24,32,40,48,56,64
  
  at 9:08 both A & B have same level (48 L)
  
  option 3) 9:08
• 9 years agoHelpfull: Yes(0) No(0)
• difference in drainage bw tanks = 2lm
  leakage by A in first 2 minutes = 12 l
  12/2 = 6 minutes
  9.02+6 minutes is 9.08
• 9 years agoHelpfull: Yes(0) No(0)
• A =>
  9:01 --- 6 L
  9:02 --- 12 L
  from 9:03 onwards --------18,24,30,36,42,48,54,60
  
  B =>
  from 9:03 onwards -------- 8,16,24,32,40,48,56,64
  
  at 9:08 both A & B have same level (48 L)
  
  option 3) 9:08
• 9 years agoHelpfull: Yes(0) No(0)
• 9:08
  In 2 minutes A would drain 12L of water ... after that B will also start draining and the relative speed of draining will be 8-6L=2L
  so 12/2=6min
  So 9:02+00:06=9:08
• 9 years agoHelpfull: Yes(0) No(0)
• a= 6 12 18 24 30 36 42 48
  b= - - 8 16 24 32 40 48
  time 9:08 is correct
• 9 years agoHelpfull: Yes(0) No(0)
• ans is 9:08..
  a--> 1min=6L
  b--> 1min=8L
  so, A B
  9:01 6 0
  9:02 12 0
  9:03 18 8
  24 16
  30 24
  36 32
  42 40
  48 48 (9:08)
  so at 9:08 the water level in both tank is same i.e 48L...
  thus, answer is 9:08.
  
• 9 years agoHelpfull: Yes(0) No(1)
• option c.. i.e. 9:08.. simply calculate multiples of 6 n 8.
  
• 9 years agoHelpfull: Yes(0) No(0)
• a starts at 9
  at 9:02 a 12l and b starts.
  9:03 a- 18l b 8l
  9:04 a- 24l b:16L
  9:05 a - 30l b- 24l
  9:06 a- 36l b-32l
  9:07 a-42l b40l
  9:08 a-48l b 48l
  i.e both have same level
• 9 years agoHelpfull: Yes(0) No(0)