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Two pipes A and B can fill a tank in 2 and 6 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?
- A1.5 min
- B2 min
- C2.5 min
- D3 min
Correct answer: A
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0
CCommunity
1.5 min
NA
NA
0
CCommunity
Solution :
If A takes two minutes to fill a tank then in one minute it can fill,
= 1/2 part of the tank
If B takes six minutes to fill a tank then in one minute it can fill,
= 1/6 part of the tank
Then A and B can together fill, = 1/2 + 1/6 = 2/3 = 1/(3/2) = 1/1.5 part of the tank in one minute.
A and B together takes 1.5 minutes to fill the tank.
So, the correct option is A). 1.5
If A takes two minutes to fill a tank then in one minute it can fill,
= 1/2 part of the tank
If B takes six minutes to fill a tank then in one minute it can fill,
= 1/6 part of the tank
Then A and B can together fill, = 1/2 + 1/6 = 2/3 = 1/(3/2) = 1/1.5 part of the tank in one minute.
A and B together takes 1.5 minutes to fill the tank.
So, the correct option is A). 1.5