Assuming your measurement is in feet - 400 square feet of timer.
That's 2.4691 cubic yards. (rounded)
1,000,000,000
Well honey, a 20x20 area equals 400 square feet. A sheet of 4x8 plywood covers 32 square feet. So, you'll need 13 sheets of plywood to cover that 20x20 space. Math doesn't lie, darling.
It equals 200 because 20x20 equals 200
25p
a lot
That depends on what depth you want the concrete !
Assuming your measurement is in feet - 400 square feet of timer.
400 (20x20) square inches is 2.78 square feet.
That's 2.4691 cubic yards. (rounded)
401
20x20 = 400 2x4= 8 400/8= 50 needed
400
2x2x2x2x
20x20
1,000,000,000