Today is Diwali night. Ayan has gone to Sushmita's house today. So what happened, they drank Mowntain Dew and went to the cinema quietly to conquer the fear. That cinema hall was very strange. All the seats in the cinema hall are arranged in the same plane. Now they got into trouble about where to sit and watch the movie conveniently. So what to do; they asked their friend Mahdi for help. Mahdi heard everything and asked them to give all the information about the cinema hall. Ayan and Sushmita observed that the $1$st row of seats is $8$ft from the movie screen and each seat is $2.5$ft apart. The seat height is $5$ft, the screen is 15ft above the floor and the screen height is $32$ft. Mahdi asked them to sit on the two seats in the middle row of the hall. Now find out, how many rows of seats in the hall?