Question

21) Snookers Lumber can convert logs into either lumber or plywood. In a given day, the mill turns out three times as many units of plywood as lumber. It makes a profit of $25 on a unit of lumber and $45 on a unit of plywood. How many of each unit must be produced and sold in order to make a prfit of $16320?

Answer 1

the mill turns out three times as many units of plywood as lumber
so 3L = P
It makes a profit of $25 on a unit of lumber and $45 on a unit of plywood
25L + 45p = 16320
Solving this system we get
P = 306, L = 102