Jawabanmu

2014-03-18T19:22:23+07:00
Α = ΔL / (L0 x t)
   = 0,24 / (200x100)
   = 0,000012
2014-03-18T19:31:32+07:00
Α = delta L ÷ Lo ×  delta T
α = 0.24 ÷ 20 × 100
α = 0.000012