A vessel contains mixture of Bournvita and Complain in the ratio 4 ∶ 1 when 280 litre of mixture out taken out and same amount of Complain is added and now ratio is 9 ∶ 11. Find the final quantity of Complain.
1
352 litre
2
335 litre
3
356 litre
4
370 litre
5
None of these