Question
Some pupils are standing in a row an equal distance from one another. The distance between the 4th and the 9th pupil is 30 m. What is the distance between the 6th and the 20th pupil?
4 m

Click button first when a symbol is required. X

Some pupils are standing in a row an equal distance from one another. The distance between the 4th and the 9th pupil is 30 m. What is the distance between the 6th and the 20th pupil?