Question 1
A lotus flower rises 25 cm above the surface of a lake. A strong wind bends it until its tip just touches the water, 55 cm horizontally from the point where the stem originally emerged, as shown. How deep is the lake at the lotus?
Editorial model: The stem is straight and keeps its length as it pivots about its fixed root.
Editorial model: The stem is straight and keeps its length as it pivots about its fixed root.