Q: Does "say" have the same meaning in the following two sentences?

Let's say you had a lot of money -- what would you do?

Let us say that he did not tell the truth.

A: the same meaning

Q: Does "get" have the same meaning in the following two sentences?

She didn't get to Chicago until after midnight.

Get permission to take a few days off from work.

A: different meanings

Q: Does "fanny" have the same meaning in the following two sentences?

Her dress was so short you could nearly see her fanny.

In England 'fanny' is vulgar slang for female genitals.

A:
the same meaning