Question

X varies directly as cube root of y. Given X=12, when Y=8. Find X, when Y is 27.

Answer 1

Answer:

X=18

Step-by-step explanation:

K is constant used to remove proportionality sign

Answer 2

Answer:

18

Step-by-step explanation:

Equation to reflect the variation:

• x=k∛y, where k is constant

When

• x=12, y=8 ⇒ 12=k∛8 ⇒ 12=2k ⇒k=6

Constant k is known so the initial equation becomes:

• x=6∛y

When

• y=27 ⇒ x=6∛27 = 6×3 = 18