Drawing on Eratosthenes' method, if two observers are due north ...

[tiffannnnyyyyyy]

Drawing on Eratosthenes' method, if two observers are due north and south of each other and are separated by 400 km, what is the circumference of their spherical world if they see the same star on their meridian at altitudes of 23 degrees and 47
 
  degrees respectively, and at the exact same time?
  A) 2,000 km B) 4,000 km C) 6,000 km D) 8,000 km E) 12,000 km

Question 2

We would expect other planets beyond our own solar system to orbit the equators of their home stars, as our own planets orbit the Sun.
 
  Indicate whether the statement is true or false

[vseab]

Answer to Question 1

C

Answer to Question 2

TRUE

[tiffannnnyyyyyy]

Excellent

[cici]

Gracias!