Question

Please look up photo for accurate description thank you in advance

Answer 1

To solve this question we will use the following diagram:

From the above diagram we get:

$\cos 38^{\circ}=\frac{x}{1m}\text{.}$

Therefore:

$x=\cos 38^{\circ}m\text{.}$

Since each panel must be separated by 0.3m, we get that the number of panels that we can put in 21 meters is:

$\frac{21m}{\cos38^{\circ}m+0.3m}\approx19.3\approx19.$

Answer: 19 panels will fit along the 21m side.