How many boxes are placed between box S and box R?

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Question

Study the following information carefully and answer the below questions. Six boxes P, Q, R, S, T and U are placed in a stack one above other. Each box contains different number of fruits 140, 160, 180, 190, 200 and 220 but not necessarily in the same order. Box which has 140 fruits is just below the box which has 220 fruits. One box placed between box T and the box which have 220 fruits. U contains 200 fruits. One box is placed between box Q and the box which have 190 fruits. Box R is placed immediately below box P. Three boxes placed between R and the box which contains 140 fruits. The box which contains 160 fruits is placed below box U. Three boxes placed between box S and the box which have 160 fruits.