tlong d jwb yaa,, bsk d kmpul...

volume = 1/3 x alas x tinggi
135 = 1/3 ( 1/2 x 4 x 9 ) x tinggi
135 = 1/3 x 18 x tinggi
135 = 6t
t = 135 / 6
  = 22,5 cm ( C )

semoga membantu.....