If x and y are inversely proportional to each other and x = 27 when y = 7, then what is the value of x when y = 21?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 9.
Calculations:
Since x and y are inversely proportional then, their product will always be constant
⇒ 27 × 7 = x × 21
⇒ x = (27 × 7)/21
⇒ x = 9