Question

Johann wants to find a rectangular solar panel with an area of 128 cm. If the

width of a panel is 20 cm, what must be the length? Is this an example of
direct variation or inverse variation?

Answer 1

6.4cm; inverse variaton

Explanation:

a p e x

Answer 2

The length of rectangular panel is 6.4 cm.

Explanation:

We are given the following information in the question:

Area of rectangular solar panel = 128 square cm

Width of panel = 20 cm

We have to find the length of the panel

Formula:

`\text{Area of rectangular panel} = \text{Width}* \text{Length}\\\Rightarrow 128 = 20* \text{Length}\\\\\text{Length} = \displaystyle(128)/(20) = 6.4\text{ cm}`

Hence, the length of rectangular panel is 6.4 cm.

This is an example of direct variation as greater would be length and breadth, the greater would be the area.