Answer: 1100 lb
Explanation:
Given : By drying tea leaves you can get 4.2% of its weight as tea.
Let x be the weight of leaves.
Then, the weight of leaves after drying them will be 4.2% of x.
=
[To convert percentage to fraction or decimal we divide it by 100]
=

According to the question , we have equation :

Hence, we need 1100 lb of fresh leaves to get 46.2 lb of tea.