Please help me.. How to answer this one? (with complete solutions, explanations and working equations)

Question

quennlee · Answer

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dustin_whitelock · Answer

This is a physics, question.

dustin_whitelock · Answer

3mar · Answer

I would like to help you @QuennLee with this particular question, although it is Maths section here!

3mar · Answer

Just Let me know when you are back!

dustin_whitelock · Answer

3mar · Answer

It was 7 days and there are more people replied to you,,,
Do you still need help?

quennlee · Answer

Oww .. sorry. :( I didn't notice that it is a math section...

3mar · Answer

No problem...
If you wish, you can post in the appropriate section and tag me there!