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Someone please help and work it out and show all the steps

Someone please help and work it out and show all the steps-example-1
User Aganju
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Consider the right triangle in the attached diagram. Using the Pythagorean theorem, you can find the distance marked "a" by
r² = a² + o²
a = √(r² - o²) = √(20² -16²)
a = √(400 - 256) = √144 = 12

The maximum depth is the difference between r and a, so is (20-12) cm = 8 cm.
Someone please help and work it out and show all the steps-example-1
User Julien Hoarau
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