# The intensity of light received at a source varies inverselyas the square of the distance from the source. A particularlight has an intensity of 20 foot-candles at 15 feet. What is the light’s intensity at 10 feet?

Question

The intensity of light received at a source varies inversely
as the square of the distance from the source. A particular
light has an intensity of 20 foot-candles at 15 feet. What is the
light’s intensity at 10 feet?