Diameter of the ball is 68.3mm, dimeter of the shadow of that ball is 195mm, how far the shadow of that ball from the source of light?

Question

Diameter of the ball is 168.3mm,

Diameter of shadow from that ball is 195mm,

How far the shadow of that ball from the source of light?

Answer 1

The ratio of the diameters of the ball and its shadow is 168.3/195 is the same as the ratio of their distances from the source of light. So the shadow is 195/168.3=1.1586 as far from the light source as the ball is. That makes it about 15.86% further away from the light source as true ball itself. To get an actual distance you need to know , for example, how far the ball is from the source.