A480n sphere 40.0cm in radius rolls without slipping 1200cm down a ramp that is

As we know that sphere roll without slipping so there is no loss of energy in this case

so here we can say that total energy is conserved

Initial Kinetic energy + initial potential energy = final kinetic energy + final potential energy

as we know that ball start from rest

height of the ball initially is given as

also we know that

also for pure rolling

also we know that

now plug in all data in above equation

So speed at the bottom of the inclined plane will be 29 rad/s