Answer:
speed of the spaceship is 0.495251 c
Time T = 1.4982 hr
Step-by-step explanation:
given data
length L1 = 1600 m
length L2 = 1390 m
to find out
speed of the spaceship and time
solution
we know here
L2 = L1 ×

so we find V by put L1 and L2
1390 = 1600 ×

V = 0.495251 c
speed of the spaceship is 0.495251 c
and
we know T1 = 1.95 hr
so we find T2
T1 = T2

put here V and T1 so we get T2
1.95 = T2

Time T = 1.4982 hr