140
70 ft
You will need 140 tiles (10 x 14 = 140)
168inches = 14ft
14 feet=168 inches
140
If by square feel you mean square feet, and the rectangle is 10ft by 14ft, you simply multiply 10 by 14 to get 140, and then add the extension ft2, so the answer is 140ft2.
13.94 square meters.
70 ft
20.4 m2
14ft x 12ft = 168 sq ft = 15.6 m2
You will need 140 tiles (10 x 14 = 140)
Yes, this shed if constructed properly will stay standing for many years.
13 ft * 10 ft = 130 ft2 1 ft2 = 0.0929 m2 130 ft2 * 0.0929 m2 / ft2 = 12.08 m2
14 ft x 9 ft = 126 sq ft = 126 x .0929 m2 = 11.7 m2 (approx)
Assuming you use the standard 4" depth, you will need at least 1.75 cubic yards.
14 ft x 17 ft = 238 sq ft = 22.11 sq metres (approx).