Question

A group of students ordered $4$ small and $6$ medium burgers. The total amount paid by the students is given. Calculate the cost of each type of burger.

$\begin{array}{cc}\text{Size of burger}& \text{Total price}\\ \text{Small}& \$20\\ \text{Medium}& \$48\end{array}$

• A. Small $=\$6,$ Medium $=\$4$
• B. Small $=\$4,$ Medium $=\$6$
• C. Small $=\$5,$ Medium $=\$8$
• D. Small $=\$8,$ Medium $=\$5$

Answer 1

The correct option is C Small $=\$5,$ Medium $=\$8$

For small burgers,
Number of burgers ordered $=4$
Total price paid $=\$20$

Let the unknown number be $“s”.$
Since $20$ is the greatest number, it must be the product of the unknown number and $4.$
$s\times 4=20$
$s=20÷4=5$
$s=5$
The unknown number is equal to $5.$

Thus. the price of each small burger is $\$5$

For medium burgers,
Number of burgers ordered $=6$
Total price paid $=\$48$

Let the unknown number be $“t”.$
Since $48$ is the greatest number, it must be the product of the unknown number and $6.$
$t\times 6=48$
$t=48÷6=8$
$t=8$
The unknown number is equal to $8.$

Thus, price of each medium burger is $\$8$.

Hence, option A is is correct.