The oil is extracted from 21 kilograms of tea seeds, 21 kilograms of tea seeds to extract 5 kilograms of oil, how many kilograms of tea seeds are needed to extract each kilogram of oil?
21 kilograms of oil tea seeds can be extracted 5 kilograms of oil, from which you can calculate the rate of oil extraction:
5÷21≈23.81%
that is, each kilogram of oil tea seeds can be extracted 0.2381 kilograms of oil.
1÷23.81%=4.2 kg
Answer: 4.2 kg of Camellia sinensis seeds are needed to extract 1 kg of oil.