Lemon-Lime Cucumber Salad

1 pkg. lime jello
1 1/2 cup boiling water
1 cup crushed pineapple(drained)
1/4 cup lemon juice
1/4 cup vinegar
1/2 cup sugar
1 cucumber(sliced fine)

Dissolve jello in the boiling water, then cool, add remaining ingredients and refrigerate until set. About 2 hours