How much yds of sand is needed to cover 4500square ft by 1 inch?

Answer 1

Assuming you mean the colloquial (builder's) yard for cubic yard:

36 in = 1 yd

3 ft = 1 yd

⇒ 3 ft x 3 ft = 1 yd x 1 yd

⇒ 9 sq ft = 1 sq yd

⇒ 4500 sq ft x 1 in = (4500 ÷ 9) sq yd x (1 ÷ 36) yd

= 138/9 cu yd

≈ 13.89 cu yd