9 7/10 divided by 3/5 =
97/10 divided by 3/5 =
97/10 * 5/3 =
97/6 = 16 1/6
Answer:
324
Step-by-step explanation:
Add up all children
4/10. Just have to look up what fractions are equivalent to 2/5 and look at the number that has 10 as a ‘denominator’
<h3>Problem Solution</h3>
Assuming the spool is a cylinder and the circumference we're winding around is that of a circle with the given area, we can write the relation between circumference and area as
... C = 2√(πA)
10 times the circumference is then
... 10C = 20√(π·20 cm²) = 40√(5π) cm ≈ 159 cm
<h3>Formula Derivation</h3>
The usual formulas for circumference and area are
... C = 2πr
... A = πr²
If we multiply the area formula by π and take the square root, we get
... πA = (πr)²
... √(πA) = πr
Multiplying this by 2 gives circumference.
... C = 2√(πA) = 2πr