Cost of 105 envelopes Is Rs 35. How many envelopes we can buy in Rs 10? Share with your friends Share 4 Akshay Kamthan answered this Hi, Cost of 105 envelopes=Rs. 35cost of 1 envelope=Rs. 35105number of envelopes we can buy for rs.10=1035105=105035=30 Hope it helps! regards, -3 View Full Answer