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Man's height / Man's shadow = Building's height / Building's shadow
Convert all to inches
69 / 168 = h / 600, where h is the height of the building.
h = (600)(69) / 168
divide h by 12 to convert to feet again
20.5 ft


Australian bedroom are 2.3 meters which is 7.5 feet
5 feet 11 inches/7 feet = 8 feet/x (mine)
71 inches/84 inches in shadow = 96 inches building height/x
cross multiply 84 inches in shadow X 96 inches building height = 8064
8064/71 = 113.57746478873239436619718309859
Divide 113.57746478873239436619718309859 by 12 = 9.4647887323943661971830985915493

Now, his:

His height/His shadow’s height = 8 feet building’s height / 9.46…………for building’s shadow

X/6.5 feet = 8 feet/9.46………..

X/78 inches = 96 inches/9.46…….

96 inches multiplied by 78 inches = 7488

7488/9.4647887323943661971830985915493 = 791.14285714285714285714285714288

791.14285714285714285714285714288 divided by 12 inches = 65.928571428571428571428571428573

65.928571428571428571428571428573 divided by 12 inches = 5.4940476190476190476190476190478