Question

A lumberjack earns a fixed salary of 50 dollars along with 5 dollar per piece of wood he sells. How many pieces of wood should he sell to earn 100 dollars?

• A. 5
• B. 10
• C. 15
• D. 20

Answer 1

The correct option is B 10

The lumberjack earns a fixed salary of 50 dollars.

For every peice of wood, he get additional 5 dollars.

Let x be the number of wood pieces.

From the given information,

50 + 5x = 100

$\Rightarrow$ 5x = 100 - 50

$\Rightarrow$ 5x = 50

$\Rightarrow$ x = 10

Hence, he has to sell 10 pieces of wood to earn 100 dollars.