I have this question stuck in it from 3 days, may I have some help

Option B. 10N

Step-by-step explanation:

Data obtained from the question include:

T = √[(fx)^2 + (fy)^2 (fz)^2]

T = 15N

Fx = fz = 2fy

15 = √[(2fy)^2 + (fy)^2 (2fy)^2]

15 = √[(4fy^2 + fy^2 + 4fy^2]

15 = √[9fy^2]

Take the square root of both side:

15^2 = (√[9fy^2])^2

225 = 9fy^2

Divide both side by the coefficient of fy^2 i.e 9

fy^2 = 225/9

fy^2 = 25

Take the square root of both side

√(fy)^2 = √25

Fy = 5N

But; fz = 2fy

Fz = 2 x 5

Fz = 10N

step-by-step explanation: