UP Police Constable 18-June-2018 Shift 2 Solved Paper

Ravi and Rashmi invested Rs. 150 and Rs. 200 respectively in a business but Ravi withdrew his money after a few months. If the end - of - twelve - months' profit was shared between Ravi and Rashmi in the ratio 1 : 2, after how many months did Ravi take out his money?