Find the values of R1 and R2 if the 5A source is generating

Find the values of R_1 and R_2 if the 5A source is generating 100 W and the 40V source is generating 500 W.

aNSWER:

I = 5A , P1 = 100W , V = 40V , P2 = 500W

We know that P = I^2R 1= (5A)^2 * R1

100W = 25A * R1

R1 = 100W/25A = 4

Now V = 40V , P = 500W

We know power = V^2/R2 = (40)^2 /R2

500W = 1600V/R2

=> R2 = 500 *1600 = 800000