Table:
text: List of tallest buildings in Africa
Timeline of tallest skyscrapers in Africa
Timeline of tallest skyscrapers in Africa
Name_ City Years_as_tallest Metres Feet Floors
Carlton Centre Johannesburg 1973–present 223 732 50
KwaDukuza eGoli Hotel Tower 1, Trust Bank Building Johannesburg 1970–1973 140 459 31
Standard Bank Building Johannesburg 1968–1970 138.8 455 34
Schlesinger Building Johannesburg 1965–1968 110 361 21
Naspers Centre Cape Town 1962–1965 93 205 22
Mutual Heights Building Cape Town 1940–1962 91 298 18
Chamber of Mines Building Johannesburg 1936–1940 80 262 18
Union Buildings Pretoria 1913–1936 60 196 10

Question: In the list of tallest buildings in Africa among the years, what is listed as the tallest having 31 floors?

Question: From the list of tallest buildings in Africa, what is the lowest floor with feet greater than htan 262 has the name of a standard bank building and meters greater than htan 138.8?

Question: Among the list of tallest buildings in Africa, what is the sum of the meters with a foot less than 196?