Physics Question on Electromagnetic waves

Question

Two waves, represented by the following equations, are travelling in the same medium $\hspace30mm y_1 = 5 sin \, 2 \pi (75 t - 0.25 x)$ $\hspace30mm y_2 = 10 sin \, 2 \pi (150 t - 0.50 x)$ The intensity $\frac{I_2}{I_1}$ of two waves is

Answer 1

Solution

We know that $\hspace40mm$ Intensity $? (amplitude)^2$