Question

Idrissa is painting the walls of his living room. He uses of a can of paint, and this is only enough to 2/3 cover of the surface of his walls. 1/6 Exactly how much paint does Idrissa need to cover the entire surface of his walls? Write a division expression to match this question.

Answer 1

Answer:

Glycerine (refractive index 1.4) is poured into a large jar of radiys 0.2m to a depth of 0.1m. There is a small light source at the centre of the bottom of the jar. Find the area of the surface of glycerine through which the light passes.