If the diameter is given in a problem, area is computed as
A = (π/4) × D<span>2 where </span><span>π is equal to 3.14</span>
<span>If D (diameter) of one circular table is 6 ft its Area is 28 sq ft.</span>
If D of another circular is 8 ft its Area is 50 sq ft.
<span>The difference between the areas of the two tables is, therefore (50-28) or 22 sq. ft.</span>
Answer: It would take 9 hours for 4 painters to paint 720 feet of fence.
Step-by-step explanation:
1.) Calculate the time needed to paint the 720 ft fence with 2 painters.
a.) Divide 720 by 280 to get how many times greater 720 is than 280.
720 / 280 ≈ 2.57
b.) Multiply the time needed to paint the 280 ft fence with 2 painters by 2.57.
7 * 2.57 ≈ 18
2.) Calculate the time needed to paint the 720 ft fence with 4 painters.
a.) Assuming that each painter paints the same amount of fence, divide the time in half, as 4 painters is double the original amount, so it would take half of the time.
18 / 2 = 9
