How big -LRB- diameter -RRB- would a spherical object orbiting the Earth at 2,000 kilometers -LRB- 1,200 mi -RRB- of altitude need to be to hide our view of the Moon ?
I 've to take cat '17 so I want to know when should I start prep and how ? Problem is I 'm in 3rd sem I 've a lot of work which will continue next sem too