a boy 5 foot tall casts a shadow 11 feet long. he stands next to a monument that has a 54 foot shadow. how tall is the monument

Answer 1

M/54 = B/11, where M=monument's height and B = the boy's height

M/54 = 5/11 the ratio of height to shadow's height is the same for the boy and the monument

cross multiply

11M = 54(5) = 270

M = 270/11 = 24 6/11 feet = monument's height

24 6/11 = 24.545454.... = about 24.55 feet