有甲乙两根绳子,甲的长度是乙的两倍,都用了60米后,甲是乙的3倍,问甲绳有多小长?'H6R5`-I,\
算式:提示.Z;^({,m/L-E8{(X7a.A9L5P-v/_2Q'?8U2g'H6R5`-I,\
答:甲绳长为,d7h-T6w8H5i:t,k7q2n米。'H6R5`-I,\