tolong dijawab ya... makasih

Al= koef muai × Lo × T
= 0.000025/C × 100 cm × (80-30)C
=0.000025/C × 100 cm × 50 C
= 0.125 cm

Lt= Al + Lo
= 0.125 cm + 100 cm
=100,125 cm jawabannya C