There is no possible answer.
The #s are 420, 480, and 540.
None of them are 40 away from a multiple of 100.
However, it is was between 300 and 600, the answer would be 360.
Let the number be 'x'.
Three times a number will then give 3x
Therefore the equation will be:
The numerator and denominator can be divided by 4 to get 12/25.
48 / 4 = 12
100 / 4 = 25
the answer is 4.36yds. 4.36 ×4.36= 19.006