In kinetic theory of ideal gas mean speed also known as average

speed is given as

Where R=gas constant=8.31Jmol^-1K^-1

T=temperature of gas

M=molar mass of gas

Given

Let temperature of hydrogen gas =T(H)

Temperature of helium gas= T(He)

Molar mass of hydrogen gas =2amu

Molar mass of helium gas =4amu

Squaring both sides

the ratio of the temperature of the hydrogen sample to the temperature of the helium sample is 1:2.