Answer:
v'=1.4 m/s
Step-by-step explanation:
Lets take mass and the radius for cylinder and sphere is same.
Mass = m
Radius = r
Moment of inertia of sphere I

Moment of inertia of cylinder I'

Lets take height of ramp = h
Energy conservation for sphere

If we take as motion is pure rolling with out slipping then
v= ωr
---1
Energy conservation for cylinder

---2
From equation 1 and 2
1.4 x 1.45²= 1.5 x v'²
v'=1.4 m/s
This is the speed of cylinder at the bottom.