Question

Sales of a product is given by the function
y = 40 + 15x, "x" represents days and "y" represents sales value. In days, the sales value reaches 250.

• A. 16
• B. 12
• C. 14
• D. 10

Answer 1

The correct option is C 14

$\text{The given function is}y=40+15x$

Where,
"x" indicates number of days and,
"y" indicates sales value.

We have to find the number of days when sales value reaches 250.

∴ Putting the value of y = 250, we get:

$\text{250 = 40 + 15x}$
$⟹\text{250 - 40 = 15x}$

$⟹\text{210 = 15x}$

$⟹\text{x}=\frac{210}{15}$

$⟹\text{x}=14=\text{Number of days}$

Therefore, we need 14 days to reach the sales value of 250.