How Do You Calculate Torque on Shaft B Given Power and Angular Speed?

[maniac90]

Homework Statement

I am trying to solve 18-10
http://img845.imageshack.us/img845/7287/motorf.jpg

Homework Equations

P = Cω

The Attempt at a Solution

P = Cω

1 HP = 746 w
2.4 HP → 1790.4 w

C = P/ω = 1790.4 w / 40 rad/s
C = 44.76 Nm

I am really stuck with this problem, I don't know how to continue.
Your help will be appreciated.

 

[Filip Larsen]

If you know the power and angular speed of shaft B you would know how to calculate the torque on shaft B. So, that leads to two questions:

1) Can you find a relation between the angular speed of shaft A and B?

2) Can you find a relation between the power of shaft A and B?

What must you assume about the belt for those two relations to be valid?