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 Forum Index >  Test Paper Related >  Primary 6 Matters Chogfu - SA1 - 2011 Maths - PRi 6 Qn 16 - pls help to elaborate
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 By: thayal (offline)  Saturday, April 28 2012 @ 07:16 AM CDT (Read 873 times)
thayal

HI All

Three taps were installed to fill a container with water .Tab A and tab B together will take 3 hour to fill the container completely. Tab C and TAB B together will take 4 hour to fill the container completely. Tab A and tab C together will take 6 hour to fill the container completely. How long will it take all three taps to fill the container completely?

thanks
thyal

Junior

Registered: 04/18/09
Posts: 21

 By: MathIzzzFun (offline)  Sunday, April 29 2012 @ 07:20 AM CDT
MathIzzzFun

Quote by: thayal

HI All

Three taps were installed to fill a container with water .Tab A and tab B together will take 3 hour to fill the container completely. Tab C and TAB B together will take 4 hour to fill the container completely. Tab A and tab C together will take 6 hour to fill the container completely. How long will it take all three taps to fill the container completely?

thanks
thyal

Hi

In 12h,
A+B will fill 4 containers
B+C will fill 3 containers
A+C will fill 2 containers

Adding, we have 2(A+B+C) will fill 9 containers in 12h
2(A+B+C) will fill 1 container in 12/9h = 4/3 h
So, A+B+C will fill 1 container in 2x 4/3h = 8/3 h

cheers.

Chatty

Registered: 04/02/10
Posts: 36

 By: thayal (offline)  Wednesday, May 02 2012 @ 06:56 AM CDT
thayal

Hi Mathlzzzfun
very sparp explanation , thanks
sekka

Junior

Registered: 04/18/09
Posts: 21

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