Question Details

If x is inversely proportional to y, and y = 7 when x = 16, find the value of x, when y = 2.

Options

A

55

B

47

C

56

D

53

Show Answer

Correct Answer :

Option C

56

Solution :

The correct answer is 56.

Step 1: Understand the relationship between x and y.
When two variables x and y are inversely proportional, their product is equal to a constant, k.
This inverse variation relationship can be written as:

x·y=k

or equivalently:

x1y1=x2y2

Step 2: Find the constant of proportionality (k).
We are given that y=7 when x=16.
Substitute these values into the formula to find k:

k=16·7

k=112

Step 3: Calculate the value of x when y = 2.
Now, we use the constant k=112 and the given value y=2 to find the new value of x:

x·2=112

Divide both sides by 2:

x=1122

x=56

Thus, when y=2, the value of x is 56.

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