Question

Answer the question in attachment​

Answer 1

We know that b =∅D

Therefore D = b / ∅

Given = radius of earth - 6400

b = 2* r

b = 2* 6400

b = 12800

∅ = 2 min = 2 × 1/ 60 × π/180 rad

Putting values :-

12800/2×π/60 × 180

= 2.2 × 10^ 10m.

Answer 2

Answer:

D = b / ∅

Given = radius of earth - 6400

b = 2* r

b = 2* 6400

b = 12800

∅ = 2 min = 2 × 1/ 60 × π/180 rad

Therefore

12800/2×π/60 × 180

= 2.2 × 10^ 10m.