Which do you think will penetrate farther into a block of lean, x-rays or gamma rays? Explain your reasonings.

I dont know if you mean lead instead of lean.

anyway i think gamma rays will penetrate further

this is because gamma rays are very penetrating, they have a shorter wave lenght than X-rays because the energy which produced them is greater.

Although both are similar but X-rays will become weaker and less penetrating when passing through a block of lead unlike the gamma rays eventhough it might reduse their intensity > but both will never stop!.

This is a hard question! 'cause both are similar but as i said i think gamma rays will penetrate further