Gopal's house was completely destroyed due to the devastating earth-quake on 12 Baishakh 2072 B.S. An organization distributed the canvas for making the tent. He made an equilateral triangular tent by using the canvas including the floor for the temporary shelter. The edge of the triangular face was 12 ft. each and length of the tent was 20 ft. How many square feet of canvas was given to him? By how many feet would the length of tent be increased if he didn't use the canvas on the floor?
