#idfk

90 messages · Page 1 of 1 (latest)

near bridge
wary pumice
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Dont u just find bolume of the water

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Then convert to litres

near bridge
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No your not allowed

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Thats what i did

wary pumice
near bridge
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You have to do some triangle shit bro

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😭

wary pumice
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Why tho

near bridge
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and i dont know why

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I don't make the rules

wary pumice
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Wheres this question from

near bridge
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some next lvl predicted paper

near bridge
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i worked out the volume initally then converted to litres

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and im like

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depth is 6th so

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6cm*

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so surely its porportional

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but its not

wary pumice
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Bc the water isnt a semi circle

near bridge
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you can't do it because its like curved

wary pumice
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The cintainer is

near bridge
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thats the cross section

ashen mist
wary pumice
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Yh the container is a semi circle

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Not the water

near bridge
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💀

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yeah doesnt matter

ashen mist
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ass question tbh

near bridge
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its curved so its not porportional

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you gotta find out the angle at the top then find length BC using cosine

rancid crypt
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I can see a way of solving it but I don’t know if it’s the most optimal way

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You can find BC using pythag

near bridge
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i think then u work out area of sector ACD then minus triangle ABC

near bridge
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u cant assume its a right angle triangle

rancid crypt
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No if you have BC you can do 1/2 x base x height

near bridge
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then ur assuming its right angled

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prolly is

rancid crypt
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You think the water level is just gonna curve?

near bridge
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ok so u do pythag thats 4 root 2

rancid crypt
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Yep

near bridge
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area of a sector requires the angle so dont you have to use cosine

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oh wait

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cant we do simple trig

rancid crypt
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Yh

wary pumice
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Is the area of the container and water not proportional?

rancid crypt
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Sin(x) = (4 root 2 / 6)

near bridge
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4 root 2 divided by 6

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ye

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70.53

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degrees

rancid crypt
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(70.53/360) x 36pi

near bridge
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Sector is then 70.53/360 * pi * 6^2

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ye

rancid crypt
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Subtract area of triangle

near bridge
rancid crypt
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1/2 x 2 x (4 root 2) = 4 root 2

near bridge
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yeh

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22.16 - 4 root 2

rancid crypt
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Then multiply by 2 because that’s only one side of it

near bridge
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16.5

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ye

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33

rancid crypt
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Is that an exact value?

near bridge
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then multiply by length?

near bridge
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33*20 = 660cm^3

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0.66L

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let me check the ms

rancid crypt
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0.66L

near bridge
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isnt 1000cm^3 = 1L

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(im cooked)

rancid crypt
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1L = 1000cm^3

near bridge
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ok fine

rancid crypt
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Wait is that right?

near bridge
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its 0.66L

wary pumice
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No

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Isnt 1l 1000cm3

rancid crypt
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No I found 1 meter cubed

near bridge
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oh 😂

rancid crypt
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🤦‍♂️

near bridge
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ye guys we got it right

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gg

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ty for the help

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pretty hard to spot that

rancid crypt
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That’s tough for a gcse question tho