Sun rays

If the sun's rays are at an angle 60° then famous Great Pyramid of Egypt (which is now high 137.3 meters) has 79.3 m long shadow. Calculate current height of neighboring chefren pyramid whose shadow is measured at the same time 78.8 m and the current height of the nearby Mikerinovi pyramid which at the same time throws a shadow 35.8 m long.

Correct answer:

a =  136.4343 m
b =  61.9841 m

Step-by-step explanation:

$$\begin{gathered} h=137.3\text{m} \\ s=79.3\text{m} \\ k=h/s=137.3/79.3=\frac{1373}{793}\doteq 1.7314 \\ \alpha =180/\pi \cdot \arctan (h/s)=180/3.1416\cdot \arctan (137.3/79.3)\doteq 59.9907{}^{\circ } \\ a=k\cdot 78.8=1.7314\cdot 78.8=136.4343\text{m} \end{gathered}$$

$b=k\cdot 35.8=1.7314\cdot 35.8=61.9841\text{m}$

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