A Porch Roof That Slopes Upward at 45° Measures 3

Multiple Choice

A porch roof that slopes upward at 45° measures 3.0 m × 5.0 m.It is covered with a slab of insulating material that is 2.0 cm thick.If the density of the insulation is 15 kg/m³,what is the weight of the insulation,in pounds,on the roof? (1.00 kg weighs 2.2 lb and density is mass per unit volume. )

A) 4.5 lb
B) 9.0 lb
C) 20 lb
D) 990 lb
E) 9.9 lb