Question

why a solid body of mass 25 kg has equal mass in space also but posses zero weight?

Answer 1

IN SPACE THE MASS REMAINS SAME BUT WEIGHT BECOMES ZERO BECAUSE THERE IS NO GRAVITY NO PULL. WEIGHT IS GRAVITY × MASS

Answer 2

Mass is the amount of quantity in a body where as weight is the force of gravity on the object.
so, as in space gravity is zero it has zero weight but body still has same quantity so mass will not be zero it will remain same.