A huge circular arc of length 4.4 ly subtends an angle '4s' at the centre of the circle. How long it would take for a body to complete 4 revolution if its speed is 8 AU per second ?
Given : 1 ly = 9.46 × 1015 m
1 AU = 1.5 × 1011 m
(1) 4.1 × 108 s
(2) 4.5 × 1010 s
(3) 3.5 × 106 s
(4) 7.2 × 108 s