Rs.1680
Liter. Rs
————-|————-
25 | 1400
:5( | ):5
5 | 280
x6( | )x6
30 | 1680
Answer:

Step-by-step explanation:
Let us suppose that items carried by one hiker is
We know that everyone will carry same number of items
hence for a group of
hikers, total number of items will be 
Answer:
3
Step-by-step explanation:
(6 + 2 x 6)/(15 - 11 + 2)
(6 + 12)/(4 + 2)
18/6
3