There were some pomegranates, passion fruits and lemons. The number of pomegranates was five times the number of passion fruits. The total number of pomegranates and passion fruits was half of the number of lemons. There were 180 fruits altogether. All the lemons were sold at 4 for $12. How much money was collected from the sale of the lemons?
Number of passion fruits = 1 u
Number of pomegranates = 5 u

Total number of passion fruits and pomegranates
= 1 u + 5 u
= 6 u

Number of lemons
= 2 x 6 u
= 12 u

Total number of fruits
= 1 u + 5 u + 12 u
= 18 u

18 u = 180

1 u = 180 ÷ 18 = 10

Number of lemons sold
= 12 u
= 12 x 10
= 120

Number of sets of 4 lemons
= 120 ÷ 4
= 30

Amount collected from the sale of lemons
= 30 x 12
= $360

Answer(s): $360