Max Query( Based On Two Table)

i've two table Rate and Topic

Sample Table

Table name==>Topic
---------------------
Topic|TID|
-----|---|
hddgg|1
trgsd|2
vnvnv|3
sdfsd|4
dfsdf|5
dsdff|6
........
........
-----------------
above table TID is primary key

next table

Table Name==>Rate
-------------------
RID|TID|Rate
---|---|--------
1--|2--|4
2--|5--|3
3--|2--|3
4--|2--|2
5--|1--|1
6--|2--|1
7--|2--|2
8--|5--|3
9--|1--|4
.........
........

above table RID is primary key and TID is foreign key..

i need Top 3 Topic but based on Maximum Rate of value

any query.........