Question

Example 1.3: The moon is at a distance of
3.84x108 m from the Earth. If viewed from two
diametrically opposite points on the Earth, the
angle subtended at the moon is 1° 54'. What is
the diameter of the Earth?​

Answer 1

$\huge\bold\purple{Answer:-}$

Angle subtended

⊖=1° 54'=114

$=114 \times 2.91 \times \: {10}^{ - 4} rad \\ = 3.317 \times {10}^{ - 2} rad$

Diameter of the Earth =⊖ x Distance to the moon from the earth

$= 3.317 \times {10}^{ - 2} \times 3.84 \times {10}^{8}m \\ = 1.274 \times {10}^{7}$

hope it will be right answer