The average weight of each box in a consignment of 20 boxes of mangoes and 15 boxes of apples is 30 kg. If the average weight of a box of mangoes is 35 kg, then what is the average weight of a box of apples?
1
\({{70} \over 3} \) kg
2
\({{75} \over 2} \) kg
3
\({{70} \over 5} \) kg
4
\({{26} \over 5} \) kg