Jawabanmu

2014-03-25T18:14:52+07:00
t1 = tinggi gedung
t2 = tinggi siswa
p1 = panjang bayangan gedung
p2 = panjang bayangan siswa

t2....t1
--- = ---
p2...p1

1,5..... t1
-----.=.----
3,5......56

3.5t1 = 1.5 x 56
3.5t1 = 84
t1 = 84/3.5 = 24 meter

2 2 2
2014-03-25T18:20:48+07:00
t1 = tinggi gedung
t2 = tinggi siswa
p1 = panjang bayangan gedung
p2 = panjang bayangan siswa 

t2....t1

p2...p1

1,5.___t1

3,5____56

3.5t1 = 1.5 x 56
3.5t1 = 84
t1 = 84/3.5 = 24 meter