tape player with speaker output power

Thread Starter


Joined Jul 4, 2008
I am having time finding out the answer to this problem.

the math I did was...

input voltage x input current = input power ( watts)

output voltage x output current = output power ( watts)

output power/input power = total output.

I did that and come up with 33.33

that isn't any of the answers to choose I am wondering if I am missing something in the problem. thanks for your help