Question

the distance from the eye at which a coin of 2.2cm diameter should be held so as to consealed the full moon with angular diameter 30' is​

Answer 1

Answer:

Hope it helps.

Step-by-step explanation:

[ As, we know that 1 degree = 60' so  30' = 60/ 30 degree]

Now, we will convert it into radians:

⇒ 1/2 * pi / 180

[ We know that the radius of the circle formed through the tip of the coin{ facing the eye} is equal is the distance. Let's take it r.]

⇒ l  = r * Theta  

⇒ 2.2 = r * 1/2 * pi / 180

⇒ 2.2 / 1/2 * pi / 180  = r

⇒ 2.2 * 2 * 180 / 1 * 22/7 = r

⇒ r = 4.4 * 180 * 7 / 22

⇒ r = 5544 /  22 = 252 cm