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Mark scheme error?

I'm hoping this is a mark scheme error:
For part (b) I get:
l=32k l = \frac{3}{2k}

But the markscheme gets l=23k l=\frac{2}{3} k
Untitled.gif

In the past, whenever I blame the text for being wrong, It turns out I'm wrong :colondollar:

Thank you for any help :smile:

Edit: just to be clear, I did what the mark scheme did up untill that last line. (the markscheme gives two equations, then puts them together to find l l

If you want the question (but I thought the mark scheme would be enough) here it is Untitled1.gif
(edited 11 years ago)
might be helpful to post the question :redface:
Never mind what I posted, misread the question :colondollar:
Reply 3
Avatar for hello calum
hello calum
OP
10
Original post by boner in jeans
might be helpful to post the question :redface:


But the ms gives the two equations. It's just solving isn't it? :colondollar:
Reply 4
Avatar for TenOfThem
TenOfThem
18
Original post by hello calum
I'm hoping this is a mark scheme error:
For part (b) I get:
l=32k l = \frac{3}{2k}

But the markscheme gets l=23k l=\frac{2}{3} k
Untitled.gif

In the past, whenever I blame the text for being wrong, It turns out I'm wrong :colondollar:

Thank you for any help :smile:

Edit: just to be clear, I did what the mark scheme did up untill that last line. (the markscheme gives two equations, then puts them together to find l l

If you want the question (but I thought the mark scheme would be enough) here it is Untitled1.gif



you appear to be correct
Mark scheme says 32k\frac{3}{2}k which is clearly a transcription error, and as you and others have pointed out, it should be 32k\frac{3}{2k}
Original post by hello calum
But the ms gives the two equations. It's just solving isn't it? :colondollar:


sorry, misread the first equation :colondollar: yes what you've got is right

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