Mathematics

Two ships on the equator are on longitudes 45oW and 45oE respectively. How far are…

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 + 45/360o

x

44/7

x 6400

= 10057 ≅ 10000km