Question

甲乙两根绳子共长22米,甲绳截去1/5后,乙绳和甲绳的长度比是3；2,乙绳长多少米?

Answer 1

甲绳截去1/5后,剩余:(4/5)*甲绳(的原来长度),
乙绳:(4/5)*甲绳=3:2,
3*(4/5)*甲绳=2*乙绳
甲绳=2*乙绳*5/12=(5/6)*乙绳;
甲绳+乙绳=22
(5/6)*乙绳+乙绳=22
(11/6)*乙绳=22
乙绳=22*6/11=12(米)
乙绳长12米.