Two pipes A and B can fill a cistern in 
minutes and 35 minutes respectively. Both pipes are opened. The cistern will be filled in just 25 minutes, if the pipe B is turned off after?
Let the pipe B be turned off after x minutes. Then, Part filled by (A + B) in x minutes + Part filled by A in (25 - x) minutes = 1 ∴ x (2/55- 1/35) + (25 - x) × 2/55 =1 x/35 = 1 - 50/55 ∴ x = 35/11 or 3*2/11 minutes Alternate method: Let total capacity of cistern = LCM(55/2, 35 ) = 385 L So A can fill in 1 min = 385/27.5 = 14L & B can fill in 1 min = 385/35 = 11L Now B is left in between , it means A is opened all time So in 25 min, A can fill = 14×25 = 350 So remaining tank = 385 -350 = 35L So B can do it in = 35/11 = 3*2/11min So B is turned off = 3*2/11min
Plants absorb nickel in the form of-
Which of the following has the authority to appoint Food Safety Officer?
Which was the first metal used by man?
Which fish can be easily grown in brackish water with quick growth rate and can tolerate the fluctuations in temperature?
Enzyme bromelain is present in which fruit:
Protein content in lentils is
In line soil the movement (loss) of water from root to soil occur through one of the following process
India is world's _____________ largest producer of fruits and vegetables.
A plant hormone, which is primary regulator of abscission process is:
Adopter category is based on
