Three cyclists are cycling in a circular track. They, respectively, take 3,11 and 18 minutes to complete the circle once. After how many minutes will they all again meet at a single point?

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

what i would say the best answer is a. 40.5

a

step-by-step explanation: