Two satellites S_(1) and S_(2)are to beset into the orbits of heights R/4 and R/6 (above the surface of earth ) respectively. They revolve around the earth in coplanar circular orbits in opposite sense (where, R = radius of earth ). Which of the following statement (s) is /are correct ?

Two satellites S_(1) and S_(2)are to beset into the orbits of heights

1.	Two satellites S_(1) and S_(2)are to beset into the orbits of heights R/4 and R/6 (above the surface of earth ) respectively. They revolve around the earth in coplanar circular orbits in opposite sense (where, R = radius of earth ). Which of the following statement (s) is /are correct ?
Answer» The RATIO of their time period is `((15)/(14))^(3//2)` The ratio of their timeperiod is `((14)/(15))^(3//2)` The ratio of their SPEEDS of PROJECTION from the surface of earth is `sqrt((23)/(15))` The ratio of their speeds of projection from the surface of earth is `sqrt((21)/(20))` Answer :A::D