Question

if x ∝ 1/y and when x =1 then y =32. Now if x=8, then the value of y is

(A) 8

(B) 4

(C) 6

(D) 2

Answer 1

Correct option is (B) 4

Solution:

Given, x ∝ 1/y 

∴ xy = k, where k is constant of variation 

When x = 1, y = 32

⇒ 1 × 32 = k 

⇒ 32 = k 

Then x = 8, y = ?

⇒ 8y = 32

⇒ y = 4