Pipes and Cisterns Practice Question and Answer
8 Q: Three pipes A , B and C takes 15, 24 and 36 minutes respectively to fill a tank. Pipe D can empty it in 1 hour. If all the four pipes are kept open then find the time taken to fill the tank.
1115 05f2b8e83cef453383f215938
5f2b8e83cef453383f215938- 1$$8{16\over 43}hr$$true
- 2$$7{2\over 3}hr$$false
- 3$$8{1\over 8}hr$$false
- 4$$5{12\over 25}hr$$false
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Answer : 1. "$$8{16\over 43}hr$$"
Q: Pipe A can fill a tank in 4 hours and pipe B can fill it in 6 hours. If they are opened on alternate hours and if pipe A is opened first then in how many hours, the tank shall be full?
2476 05f2120ea4ab50b169742bbc3
5f2120ea4ab50b169742bbc3- 1$$3{1\over 2}\ hrs$$false
- 2$$3{1\over 4}\ hrs$$false
- 3$$4{1\over 2}\ hrs$$false
- 4$$4{2\over 3}\ hrs$$true
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Answer : 4. "$$4{2\over 3}\ hrs$$ "
Q: The pipe can fill a tank in 36 minutes and the another pipe can empty it in 45 minutes. If both pipes are opened simultaneously, the time (in hours) it takes to fill half the capacity of the tank is:
865 05f1aa51c64a4af418928c859
5f1aa51c64a4af418928c859- 12false
- 21.5true
- 31.25false
- 41.75false
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Answer : 2. "1.5"
Q: A tap can fill the tank in 8 hours and another can empty it in 16 hours. If both the taps are opened simultaneously, the time (in hours) to fill the tank is__.
949 05f0ec130dcdb5f61f5c474d0
5f0ec130dcdb5f61f5c474d0- 118 hoursfalse
- 216 hourstrue
- 38 hoursfalse
- 410 hoursfalse
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Answer : 2. "16 hours"
Q: Two pipes P and Q can fill a cistern in 36 and 48 minutes respectively. Both pipes are opened together, after how many minutes should Q be turned off,so that the cistern be fill in 24 minutes?
4698 05eec87d9985769334140bf94
5eec87d9985769334140bf94- 16 minfalse
- 216 mintrue
- 310 minfalse
- 412 minfalse
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Answer : 2. "16 min"
Q: Tank is normally filled in 8 hours but takes 2 hours longer to fill because of a leak in its bottom. If the cistern is full, in how many hours will the leak empty it?
1135 05ebe27eb828a397cdc645f7f
5ebe27eb828a397cdc645f7f- 145false
- 250false
- 340true
- 435false
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Answer : 3. "40"
Q: Pipe A can fill a tank in 6 hours. Pipe B can fill the same tank in 10 hours – pipe A, B, C together can fill the same tank in 12 hours. In how many hours pipe C can fill the tank alone?
1168 05eb946b5a445f56aef0935a1
5eb946b5a445f56aef0935a1- 1$$12{1\over2} $$ hoursfalse
- 24 hoursfalse
- 315 hoursfalse
- 4Not possibletrue
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Answer : 4. "Not possible"
Q: Three pipes A, B and C can fill a cistern in 10 hours, 12 hours and 15 hours respectively. First A was opened. After 2 hour, B was opened and after 4 hours from the start of A, C was also opened. Find the time in which the cistern is just full.
2699 05eaba5b21cb95f071aa27a60
5eaba5b21cb95f071aa27a60- 12 hoursfalse
- 24 hoursfalse
- 32 hours 52 minfalse
- 45 hours 44 min.true
- 5None of thesefalse
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