is आमिर तुमसे लंबा है ok here too?
Yes. That is correct as well.
Why is "Aamir is much taller than you" wrong here?
Amir is much taller than you
I still don't know when we should use और and when ज़्यादा.
Guessing... AUR is used when talking about discreet things, quantities. ZYADA is used when comparing qualities, like height, or color.
Why Aamir is MUCH taller than you is wrong? Because it is given as Zyada lamba.
What is wrong with "Amir is taller than you"?
'आमिर' could be written as 'Amir' too, I think, isn't it?
No, that will become "अमीर" which is another hindi word for "rich" like
He is very rich - वह बहुत अमीर है
With "ज़्यादा लंबा " would it also be correct to say "Aamir is much taller than you"?
Yes you definitely could say if he is 8 ft. tall and she is 5 ft. short.
They don't accept Amir!!!!!