Question

If y is directly proportional to x and Y = 40 when x=4 what is the value of x when y =23

Answer 1

2.3

Explanation:

Since y is directly proportional to x,

y = kx.

=> 40=k X 4

=> k=10

So y=10x

If we put y=23 in the above equation,

x=2.3

or

40:4 = 23:x

=>x=2.3