Two numbers are in theratio4: 7. lf their HCF is 26, then the sum of these two numbers will be:

Let the two numbers are 4x and 7x. H. C. F. of 4x and $7x =x$. 

Now, $x=26$. So, two numbers are $4 x 26$ and $7 x 26$. 

Sum of two numbers $= 4 X 26 + 7 X 26 = 11 X 26 = 286$.