If you walked 640 feet you would have covered the distance of approximately 1/8 of a mile. 1/4 of a mile is 1340 feet and a mile is 5280 feet.
8 X 10 X x = 640ft3 80x = 640 80x/80 = 640/80 x = 8 The answer is 8 feet deep
Assuming the bricks are 4 inches wide and 16 inches long. Then the area of one brick is 64 square inches = 64/144 = 4/9 square feet, hence to cover 640 square feet we need (640)/(4/9) = (640x9)/4 = 160x 9 = 1440
640 acres = 27,878,400 square feet.
1 yard = 3 feet 640 yards = 1920 feet
There are 12 inches in a foot, so 640/12 = 53.3333 feet.
640 square feet = 71.1 square yards.
640 acres = 27,878,400ft²
There are 30.48 centimetres in one foot. Therefore, rounded to two decimal places, 640 centimetres is equal to 640/30.48 = 21.00 feet.
There are 0.3048 metres in one foot. Therefore, rounded to two decimal places, 640 metres is equal to 640/0.3048 = 2099.74 feet.
1000 feet
640 acres is 27,878,400 square feet (@43,560 sq ft per acre).