Josh wants to make the lamp purple.
He will use dye to make the plastic purple.
Josh will mix red dye with green dye and blue dye in the ratio 9:3:15 to make
purple dye.
Josh uses 30 litres of green dye.
(b) How many litres of purple dye will Josh make with the 30 litres of green dye?
Show a check of your working.
(5)