5+3=8

Water = 96× 3/8 = 36g;

Fruit juice = 96× 5/8 = 60g;

3、

1+4=5

Each piece needs wool = 480×4/5 = 384g；;

800 pieces of wool: 384×800 = 307200g；;

4、

Solution: Suppose the rest of the journey takes X minutes.

130:25=(234- 130):x

130:25= 104:x

130x=25× 104

x=20