+0  
 
+3
689
6
avatar

An empty tank has a capacity of 55.2 litres.Water flows from a Tap A at 3.6 litres per mimute and 2.4 litres per minute from a Tap B.Tap A was turned on first.Tap B was turned on 2 minutes later.The taps were turned off at the same time when the tank was completely filled without overflowing.How much water flowed from Tap B?

Guest Jun 24, 2014

Best Answer 

 #3
avatar+94203 
+8

I added this one to puzzles too.  I like these.       ♬    ♬    ♬ 

Melody  Jun 24, 2014
 #1
avatar+93038 
+8

An empty tank has a capacity of 55.2 litres.Water flows from a Tap A at 3.6 litres per mimute and 2.4 litres per minute from a Tap B.Tap A was turned on first.Tap B was turned on 2 minutes later.The taps were turned off at the same time when the tank was completely filled without overflowing.How much water flowed from Tap B?

When B is turned on, A has put 3.6(2) = 7.2 litres of water into the tank. So there remain 55.2 - 7.2 = 48 litres to fill.  So we have:

3.6T + 2.4T = 48     where T is the time it takes to fill the rest of the tank  .......Simpifying, we have

6T = 48

T  = 8 minutes

So, since B was on for 8 minutes, it put 2.4(8) -= 19.2  litres into the tank.

 

CPhill  Jun 24, 2014
 #2
avatar+20745 
+8

An empty tank has a capacity of 55.2 litres.Water flows from a Tap A at 3.6 litres per mimute and 2.4 litres per minute from a Tap B.Tap A was turned on first.Tap B was turned on 2 minutes later.The taps were turned off at the same time when the tank was completely filled without overflowing.How much water flowed from Tap B ?

 

The tank after 2 min. has an empty capacity of$$55.2 - \dfrac{3.6\;l}{min}*2\;min=55.2\;l - 7.2\;l=48\;l$$

$$\left(
\dfrac{3.6\;l}{min}+\dfrac{2.4\;l}{min}
\right)
\times t_{min} = 48\;l \quad | \quad t_{min} = \mbox{time Tab B is running}$$

$$t_{min}=\dfrac{48\;l}{3.6\;l+2.4\;l}*min=\dfrac{48\;\not{l}}{6\;\not{l}}*min=8\;min$$

How much water flowed from Tap B ?

$$=\dfrac{2.4\;l}{min}*8\;min=\textcolor[rgb]{1,0,0}{19.2\;l}$$

heureka  Jun 24, 2014
 #3
avatar+94203 
+8
Best Answer

I added this one to puzzles too.  I like these.       ♬    ♬    ♬ 

Melody  Jun 24, 2014
 #4
avatar+831 
0

When B is turned on  A has put 3.6(2) = 7.2 litres of water into the tank So there remain 55.2-7.2 = 48 liters to fill.So we have:

3.6T + 2.4T = 48where T is the time it takes to fill the rest of the tank...Simpifying we have

6T = 48

T  = 8 minutes

So, since B was on for 8 minutes it put 2.4(8) = 19.2  liters into the tank.

KOOL-AID  Jun 24, 2014
 #5
avatar+94203 
0

Copying other person's answer is called Plagiarism.

It is illegal because you are stealing someone elses work.  It is cheating.

Do not do this KOOL-AID.  It is definitely not COOL!

Melody  Jun 24, 2014
 #6
avatar+93038 
0

Kool-Aid......if you're going to "steal" answers....at least make them LOOK a LITTLE different from the original !!! Why would you do this??? I may sometimes present another way to find an answer, but I usually don't mimic the same approach given by others. This is known as "beating a dead horse".......

 

CPhill  Jun 24, 2014

19 Online Users

avatar
avatar
avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.