Question

If x∝y and x1=5,y1=210 and x2 = 2, then find y2?



A. 200

B. 84

C. 99

D. 70

​

Answer 1

Step-by-step explanation:

My answer is 84 hope it helps u plz mark it as Brainlist

Answer 2

Given:

 x and y are directly proportional .

 Also $\bf x_1=5,y_1=210,x_2=2$

To Find :

The value of $\bf y_2$?

Step-by-step explanation:

   

• Since x and y are directly proportional then $\bf\frac{x}{y}=k$ , where k is any constant .

• Similarly we can write $\bf\frac{x_1}{y_1}=\frac{x_2}{y_2}=k$

NOW

We have

               $\bf\frac{x_1}{y_1}=\frac{x_2}{y_2}$

•  By putting the given values in above equation we get

               $\bf\Rightarrow\frac{5}{210}=\frac{2}{y_2}$

•  Apply cross multiplying

              $\bf\Rightarrow\ y_2=\frac{2\times210}{5}$

• Cancelling the above equation

               $\bf y_2 =84$

Hence , the value of $\bf y_2$ is 84.