Let the wealth inherited by Vijay be ‘x’ crores.
His wealth became x2 because of the soft drinks company.
But the toys manufacturing company brought a loss of kx.
Now the wealth of Vijay will be x2−kx.
This was mentioned to be equal to -4 crores
⇒x2−kx=−4
⇒x2−kx+4=0
For this scenario to be possible, D≥0⇒k2−16≥0
⇒k2≥16
⇒k≥4∵k>0
So, k is any value greater than or equal to 4.