How does hormone affect a girl's body between the age of 10-15 years?

How does altitude affect 'g'?

How does the deforestation affect wildlife ?

How does volcano affect the climate?

A's age is 9 years more than B's age. After 10 years of age of A twice the age of B 10 years before. Find their present ages

The average age of 14 girls and their teacher's age is 15 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?

The average age of 14 girls and their teacher's age is 15 years. If the teacher's age is excluded, the average re duces by 1. What is the teacher's age?