Answer:
20.6 m
Explanation:
P₁ = Power of first bulb = 45 W
P₂ = Power of second bulb = 130 W
r₁ = distance from the first bulb
r₂ = distance from the second bulb = 35 m
Using the equation
[tex]\frac{P_{1}}{r_{1}^{2}} = \frac{P_{2}}{r_{2}^{2}}[/tex]
Inserting the values
[tex]\frac{45}{r_{1}^{2}} = \frac{130}{35^{2}}[/tex]
r₁ = 20.6 m
