Question

The dimensions of a solar panel are given. Determine the cost of buying the solar panel if the cost per square unit is $\$10$.

• A. $\$496$
• B. $\$4,960$
• C. $\$3,160$
• D. $\$200$

Answer 1

The correct option is B $\$4,960$

$\bullet$ Length = 16 = 10 units + 6 units
$\bullet$ Width = 31 units = 30 units + 1 unit
Let’s determine the area using the partitioning method.
$$\begin{array}{ccc}& 10& 6\\ 30& 300& 180\\ 1& 10& 6\end{array}$$
Area of solar panel A $=300+180+10+6=496\text{sq units}$.
$\bullet$ Cost of 1 sq unit $=\$10$
$\bullet$ Cost of 496 sq units $=496\times \text{Cost of 1 sq unit}$
$\bullet$ Cost of 496 sq units $=496\times \$10=\$4,960$