Question

You stand 4 meters from the bottom of a lamp post that is 3 m tall. How far would a firefly fly if it flew from your big toe to the lamp?

Answer 1

You stand 4 meters from the bottom of a lamp post that is 3 m tall. How far would a firefly fly if it flew from your big toe to the lamp?

Suppose, for example, that you're 1.8 meters tall

That means that the shadow would be

$$(4 + x) / 4 = 3 / 1.8$$ $$4 + x = 6.66$$

So the shadow would be 2.66

Firefly would fly up to $\sqrt{3^2 + 6.66^2} = 7.3$

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