500 million points for anyone who can solve this maths problem

[Toyman]

toyman I see where you're coming from with the ellipses idea but it's wrong sorry :| The height of the minor axis (y) is unknown... you are taking the rectangle height as that axis...

But surely, the height of the ellipse must equal the height of the rectangle? If not, then there isnt enough info to solve the problem.

Furthermore, I actually did the exact same approach as you did lol - the only difference is i didnt use the aquarium calculator, cos as you might notice, it only gives whole numbers in its results. (try fiddlng around with it and you'll see).

Also - I'm guessing that you put 3.55 as the length in the acquarium calc? thats what i did, and i got the same answer as you. which means that length (height) of the round part is in fact 3.55.?

To reiterate :: i actually did the exact same thing as you did lol - only difference is that i used a different formula for the round part when i noticed acquarium only gives whole number results. Note: using the google formula, would have given 11.33 where acquarium gave 11.

[miniq]

fck this sht



I go back to my original post saying it's a big approximation game XD

It can be solved...it's actually quite a simple problem..ellipse bounding a rectangle

here we go:

forget that shtty aquarium site...I'll work it out tomorrow to fifty billion sig figs it's 2am right now here XD

[Toyman]

My math must be absolutely dreadful. I've probably forgotten a bunch of math rules. Im embarrassed. Doing it by hand and following the steps from that aquarium page:

I got 2.317 for radius
I got 20.5764 for theta
And I somehow got 46.864 for a circle segment. That's obviously wrong.

Anyone else going to give it a shot?

EDIT: Here's my work

Is ur calc set to radians or degrees? I havent used a scientific calc in years, but i remember that the setting can mess up your calculation

[fighter1234]

I start University in September and currently im just working through past papers to try and get a head start.

I have completed 12/13 question. However this one is annoying the life out of me.

[IMG][/IMG]

if the 2 sides were semi circles i could do it but they arent. Any budding mathematicians on here? I need to find out the area of the shape at the top of the diagram

[IMG][/IMG]

This is how i have started.

I'm studying engineering so I might be able to help. Isn't it just the area of the rectangle + 2 segments? (Where you find the segment area by working out the area of a sector from the larger circle and subtracting the inner triangle)

[DoktorSleepless]

toyman I see where you're coming from with the ellipses idea but it's wrong sorry :| The height of the minor axis (y) is unknown... you are taking the rectangle height as that axis...

doktorsleepelss - your value of 'X' goes from 2.54 to 0.8275...lol it should remain 0.8275... (in the radius formulae)

I just realized I wrote it down incorrectly on paper, but I did enter it correctly on the calculator. I'm 100% sure the radius is correct. My mistake must have happened in the steps after.

[da_beast]

Haha I'm glad I'm not not the only one who is finding it hard. I like the elipse idea because we can calculate the width of it and we know the height is equal to that of the central rectangle

I thought the question would be real simple to answer and that I was just overlooking some simple way of doing it but clearly not.

[fighter1234]

Haha I'm glad I'm not not the only one who is finding it hard. I like the elipse idea because we can calculate the width of it and we know the height is equal to that of the central rectangle

I thought the question would be real simple to answer and that I was just overlooking some simple way of doing it but clearly not.

I had a quick go at it. If I interpreted the question correctly, it should be right...

[da_beast]

I had a quick go at it. If I interpreted the question correctly, it should be right...

[IMG][/IMG]

This is what i did using the ellipse calculation. Its out from the aquarium one and yours so im pretty sure mines is wrong.

Yours looks right. I tried what you did before but i used the wrong angle.

[da_beast]

This was my 1st attempt but it was wrong because i calculated the wrong angle

[fighter1234]

[IMG][/IMG]

This is what i did using the ellipse calculation. Its out from the aquarium one and yours so im pretty sure mines is wrong.

Yours looks right. I tried what you did before but i used the wrong angle.

You can't use that ellipse method because you don't know that the segments are half of an ellipse. For that to be true the gradient at the top needs to be zero.

Btw what is that test on?