Two Converging Lenses,the First with Focal Length 10

Multiple Choice

Two converging lenses,the first with focal length 10.0 cm and the second with focal length 20.0 cm,are separated by 40.0 cm.An object,3.00 cm in height,is placed 30.0 cm in front of the first lens.Where is the image caused by the first lens?

A) 7.50 cm after the first lens
B) 7.50 cm after the second lens
C) 15.0 cm after the first lens
D) 15.0 cm after the second lens
E) 55.0 cm after the second lens