please jawab beserta caranya

dik = h = 3m
w = m.g
w = 4500 . 10m/s2 = 45000n
f = 7500 n
dit = s
jwb = s = w×h ÷ f
s = 45000n × 3m ÷ 7500 n
s = 135000 ÷ 7500
s = 18 m (b.)