At what temperature will hydrogen molecules have the same root mean square speed as nitrogen molecules at `27^(@)C` ?

The root mean square speed of gas molecules

Calculate the root mean square speed of methane molecules at 27^(@)C .

Calculate the root mean square speed of hydrogen molecule at STP

At what temperature will be the oxygen molecules have the same root mean square root mean square speed as hydrogen molecules at 300 K ?

At what temperature will hydrogen molecules have the same KE as nitrogen molecules at 280 K ?