Two ships on the equator are on longitudes 45oW and 45oE respectively. How far are they apart along the equator, correct to 2 significant figures? (Take the radius of earth = 6400km and π = 22/7)
-
A.
15,000km -
B.
10,000km -
C.
6,400km -
D.
5,000km -
E.
3,200km
Correct Answer: Option B
Explanation
D = θ/360 x 2πR
45 + 45360o
x
447
x 6400
= 10057 ≅ 10000km