Question

we have 100 litres of a mixture of milk and water which is 10% water. How much more pure milk should be added so that the new mixture has only 5% water?






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Answer 1

Answer:

Answered 

A mixture of milk and water, sound more like chemistry question, but when yu read the question careful and analysed it , yu find out that yu just need a simple basic mathematical approach .

The mathematical appraoch for this question is this:

Initial volume of mix =100l

Initial volume of water in mix = 10%(100l) = 10l

Initial volume of milk in mix=90%(100l)=90l

Let the unknown quantity (liters) of milk added be x

Remember it was just only milk that was added, no water was further added.hence the volume of water remains constant.

Hence:

New volume of mix = (100+x)liters

Volume of water in newmixture=5%(100+x)

Volume of milk in new mixture=95%(100+x)

Hence finding value of x(unknown liters of milk added) ?

Volume of water remains unchanged

Vol of water in initial mix =vol of water in new mixture

10l = 5% (100+x)l

10 =0.05(100+x)

10 = 5 +0.05x

10–5 =0.05x

5 =0.05x

x =5/0.05 = 100liters

Hence the volume of milk added to the mixture is 100liters.

Alternatively :

We can also state that since the initial volume of milk in mixture is 90l, then the new volume will be (90+x)liters.

Hence: (90+x)l = 95%(100+x)l

90+x = 0.95(100+x)

90 +x =95 + 0.95x

x-0.95x =95–90

0.05x =5

x = 5/0.05 = 100 liters

Hope this help.

Answer 2

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Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.