I had 54 bananas. I sold the bananas in groups of three. Is old each group of bananas for sh.10. How much money did I get?

You sold the bananas in groups of three, so the number of groups is 54/3 = <<54/3=18>>18 groups.

Each group was sold for sh.10, so the total amount of money you got is 18 x sh.10 = sh.<<18*10=180>>180. Answer: \boxed{180}.