Respuesta :
The answer is c.
Buenos Aires 2007-14-01-00-00_files/i0220008.jpg Tucuman 2007-14-01-00-00_files/i0220009.jpg Bahia Blanca 2007-14-01-00-00_files/i0220010.jpg Salta 2007-14-01-00-00_files/i0220011.jpg Buenos Aires
Buenos Aires to Tucuman: BA-T = 211
Buenos Aires to Bahia Blanca: BA-BB = 268
Buenos Aires to Salta: BA-S = 238
Tucuman to Buenos Aires: T-BA = 272
Tucuman to Bahia Blanca: T-BB = 195
Tucuman to Salta: T-S = 203
Bahia Blanca to Buenos Aires: BB-BA = 200
Bahia Blanca to Tucuman: BB-T = 229
Bahia Blanca to Salta: BB-S = 211
Salta to Buenos Aires: S-BA = 193
Salta to Tucuman: S-T = 267
Salta to Bahia Blanca: S-BB = 275
Let's check all options:
a. Buenos Aires - Salta - Bahia Blanca - Tucuman - Buenos Aires:
BA-S + S-BB + BB-T + T-BA = 238 + 275 + 229 + 272 = 1014
b. Buenos Aires - Tucuman - Salta - Bahia Blanca - Buenos Aires:
BA-T + T-S + S-BB + BB-BA = 211 + 203 + 275 + 200 = 889
c. Buenos Aires - Tucuman - Bahia Blanca - Salta - Buenos Aires:
BA-T + T-BB + BB-S + S-BA = 211 + 195 + 211 + 193 = 810
d. Buenos Aires - Bahia Blanca - Tucuman - Salta - Buenos Aires:
BA-BB + BB-T + T-S + S-BA = 268 + 229 + 203 + 193 = 893
Thus, the least expensive way to visit all of these cities is choice c.
Buenos Aires 2007-14-01-00-00_files/i0220008.jpg Tucuman 2007-14-01-00-00_files/i0220009.jpg Bahia Blanca 2007-14-01-00-00_files/i0220010.jpg Salta 2007-14-01-00-00_files/i0220011.jpg Buenos Aires
Buenos Aires to Tucuman: BA-T = 211
Buenos Aires to Bahia Blanca: BA-BB = 268
Buenos Aires to Salta: BA-S = 238
Tucuman to Buenos Aires: T-BA = 272
Tucuman to Bahia Blanca: T-BB = 195
Tucuman to Salta: T-S = 203
Bahia Blanca to Buenos Aires: BB-BA = 200
Bahia Blanca to Tucuman: BB-T = 229
Bahia Blanca to Salta: BB-S = 211
Salta to Buenos Aires: S-BA = 193
Salta to Tucuman: S-T = 267
Salta to Bahia Blanca: S-BB = 275
Let's check all options:
a. Buenos Aires - Salta - Bahia Blanca - Tucuman - Buenos Aires:
BA-S + S-BB + BB-T + T-BA = 238 + 275 + 229 + 272 = 1014
b. Buenos Aires - Tucuman - Salta - Bahia Blanca - Buenos Aires:
BA-T + T-S + S-BB + BB-BA = 211 + 203 + 275 + 200 = 889
c. Buenos Aires - Tucuman - Bahia Blanca - Salta - Buenos Aires:
BA-T + T-BB + BB-S + S-BA = 211 + 195 + 211 + 193 = 810
d. Buenos Aires - Bahia Blanca - Tucuman - Salta - Buenos Aires:
BA-BB + BB-T + T-S + S-BA = 268 + 229 + 203 + 193 = 893
Thus, the least expensive way to visit all of these cities is choice c.