$$18\div3=6$$ 
A $$12$$-metre long steel pipe was cut into few pieces. The length of each piece is $$3$$ metres. It takes $$18$$ minutes to complete the whole process. How long does it take to cut a $$12$$-metre pipe into $$6$$-metre sections? 
1: $$6$$ minutes 
2: $$9$$ minutes 
3: $$12$$ minutes 
4: $$18$$ minutes 
5: None of the above 