The diagonals of 60ft by 40ft are 72.11 feet.
20
1yd = 3ft 20yd x 3ft/yd = 60ft 60ft + 1ft = 61ft
14.8 yards
1yd = 3ft so 20yd = 60ft
There are 3ft in 1 yd so: 60ft/3 = 20yds
k
60 feet 3ft = 1 yd ?ft = 20 yd 60ft = 20yd
27 cubic yards.will cover 720 square feet @ 1 foot thick
60ft
60ft = 0.0183km
60' = 1828.8 cm