I Believe the answer is A but D looks good too.
Answer:

Explanation:
ri = 0.20cm
ro = 0.4 cm
length L = 13m
resistivity \rho = 2.00*10^13 ohm m
resistance can be determine by using following relation



Answer:
There is nothing faster then light
Explanation:
We know, speed = Distance / Time
d = 384,750 Km
t = 2 days, 19.5 hours = 48+19.5 = 67.5 hour
Substitute their values,
s = 384,750 / 67.5
s = 5700 Km/h
In short, Your Answer would be 5700 Km/h
Hope this helps!