A shopkeeper has five containers P, Q, R, S and T. The weight of P is equal to the average weight of Q, R and S and the weight of Q is equal to the average weight of P, R and S. The average weight of P and R is equal to the average weight of R and S. T is 30 kg heavier than R and the average weight of Q and S is 60 kg. What is the average weight (in kgs) of all the containers together?
1
66 kgs
2
60 kgs
3
90 kgs
4
45 kgs