A lens and a convex mirror problem

[zimo]

Homework Statement

A body is positioned 40 cm from the left of a lens (f=30) and the lens is positioned 100cm left of a convex mirror (|R|=60), where will be the image and what type and magnitude will it have?

Homework Equations

1/u + 1/v = 1/f

The Attempt at a Solution

I tried to calculate the image after the lens - and got v = 120 cm.

Now, I don't know how to interpret the answer.
Can anyone help me out on this?

Thanks

 

[rl.bhat]

The convex mirror interrupt the rays to form the real image.
So (120 - 100) = 20 cm becomes the virtual object distance for the convex mirror. Now proceed.

 

[zimo]

That's my problem, now it is considered concave?

 

[ehild]

You can consider the mirror concave, and find the image distance that way, or you take it convex and use negative object distance.

ehild