-- Database schema
| roller_coaster : Roller_Coaster_ID [ INT ] primary_key , Name [ TEXT ] , Park [ TEXT ] , Country_ID [ INT ] roller_coaster.Country_ID = country.Country_ID , Length [ INT ] , Height [ INT ] , Speed [ TEXT ] , Opened [ TEXT ] , Status [ TEXT ] | country : Country_ID [ INT ] primary_key , Name [ TEXT ] , Population [ INT ] , Area [ INT ] , Languages [ TEXT ] |
-- -- What are the country names, area and population which has both roller coasters with speed higher

SELECT T1.name ,  T1.area ,  T1.population FROM country AS T1 JOIN roller_coaster AS T2 ON T1.Country_ID  =  T2.Country_ID WHERE T2.speed  >  60 INTERSECT SELECT T1.name ,  T1.area ,  T1.population FROM country AS T1 JOIN roller_coaster AS T2 ON T1.Country_ID  =  T2.Country_ID WHERE T2.speed  <  55;