divide by 9
490 sq feet = 490/9 = 54.44... sq yards.
5 inches is 5/12 feet. So volume of concrete required is 490 x 5/12 = 204.16 cubic feet There are 3 x 3 x 3 = 27 cubic feet in a cubic yard. Therefore the volume required is 204/27 = 7.56 cubic yards (say 8 cubic yards). A useful example of estimating foundations and floor is at `Estimating - Foundation and Floor' http://www.inquirewithin.biz/Vol2/Estimating/estimating_foundations.htm
3 feet = 1 yard so the answer is 1,470 feet.
490 cm is 16.1 feet.
490 square feet.
A half-inch thick sheet of plate steel measuring 4 feet by 8 feet has a volume of 128 cubic feet (4 ft x 8 ft x 0.5 ft). Steel has a density of approximately 490 pounds per cubic foot. Therefore, the weight of the sheet would be about 62,720 pounds (128 cubic feet x 490 pounds/cubic foot).
490 square feet.
35 × 14 = 490 square feet
At North Star they said that the Sun is 490 billion feet away from the earth
1,607.61 feet or 1,607 feet 7.3 inches.
Circumference of the circle in feet = 24*pi Area of the circle in square feet = pi*122
.490