Question

Pls help me solve this question

Answer 1

Answer:

This is a question from Arithmetic progression.

Step-by-step explanation:

Each class with 5 section will plant the trees according to their grade. Hence the AP will be :

5,10,15,20,25....60.

We have a=5; d=5 ; an=60; n=12

Sum=n/2(a+an)

=12/2(5+60)

=6(65)

=390

Hence there will be 390 trees planted in all