Question

As claudia walks away from a 264-cm lampost, the tip of her shadow moves twice as fast as she does. what is claudia's height?

Answer 1

the key tends to be in the similar triangles

Answer 2

is the tip of her shadow moving with respect to claude or to the lamppost?

Answer 3

l/c = (d+s)/s

l/c = d/s + 1

l/c - 1 = d/s

s = d/(l/c-1)

s = d/(l-c/c)

s = cd/ (l-c)

s' = cd'/(l-c)

2d' = cd'/(l-c)

2 = c/(l-c)

2(l-c) = c

2l-2c = c

2l = c+2c

2l = c(1+2)

2l/3 = c

claud might be 2/3 the height of the lamppost