Question

Question no.1.Please tell me the process.

Answer 1

The maximum resultant of vectors will be
their sum=10+25=35

the minimum resultant would be their difference
25-10=15
Now the resultant of two vectors could be equal to 15 or greater than 15 by less than or equal to 35
let the resultant will be x
then
$15 \leqslant x \geqslant 35$
hence from option answer would be Option {D}
that is 15