so my question is that you have written the side of the square is 21 m so in the question is like we need to find the length of the side of a square so thus length is 21 m i right ....
second is that it's like 441 m square so what happened to the metre square like in my teacher has done like a root on the top of metre square so that the square get divided by the root and metre is only left
if it's right tell me the reason like why we need to put a root and how it has came
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