How to solve the following?

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Answer 1 · 2018-05-15T06:23:37

#4.0# m

Here we have a case of similar right triangles:

(1) The whole picture: Base #= 5# m, Height #= h# m

(2) The left picture: Base #=2# m, Height #= 1.6# m

With similar triangles, the corresponding sides are proportional.

Thus, #h/5 = 1.6/2#

#2h = 8.0#

#h = 4.0# m

Therefore, the light is 4.0 m above the ground.