A group of students, each 7 years old, visited a botanical garden in 2015; another group of students, each 10 years old, visited in 2020. The official who guided the groups through the garden said about the same historical tree in the garden to both groups: ``The age of this tree is equal to the sum of all of your ages.'' From these two groups, if the number of students in the first group is 10 more than the number of students in the second group, how old is this tree in 2020? A) 220 B) 230 C) 240 D) 250 E) 260
A group of students, each 7 years old, visited a botanical garden in 2015; another group of students, each 10 years old, visited in 2020. The official who guided the groups through the garden said about the same historical tree in the garden to both groups: ``The age of this tree is equal to the sum of all of your ages.''
From these two groups, if the number of students in the first group is 10 more than the number of students in the second group, how old is this tree in 2020?\\
A) 220\\
B) 230\\
C) 240\\
D) 250\\
E) 260