Bece Model Questions Vol1 2021 Cultural And Creative Arts Question 5

A student is required to prepare a specific shade of orange paint for a school mural. The target colour is defined as having a hue that lies exactly halfway between the pure red (hue angle 0°) and pure yellow (hue angle 60°) on the standard colour wheel, and a value (lightness) of 70% on a 0‑100% scale. The only pigments available are: - Red paint (value 50%) - Yellow paint (value 50%) - White paint (value 100%) The student must determine the mixing proportions and comment on the practical procedure. Answer the following: (a) State the hue angle (in degrees) of the required orange shade. (b) Calculate the relative amounts of red and yellow paint needed to obtain the required hue, assuming hue angles combine linearly with proportion. (c) Using the values given, determine how much white paint must be added to the red‑yellow mixture (found in part b) to achieve the required value of 70%. Express the amount of white paint in the same unit as the red and yellow quantities (e.g., if 1 cm³ of each red and yellow is used, give the volume of white required). (d) Identify two possible sources of error that could affect the colour produced and suggest one way to minimise each error.