An aeroplane moving horizontally with a speed of 720 km/h drops a food packet, while flying at a height of 396.9 m. The time taken by a food packet to reach the ground and its horizontal range is (Take g = 9.8 m/sec2)
(a) 3 sec and 2000 m
(b) 5 sec and 500 m
(c) 8 sec and 1500 m
(d) 9 sec and 1800 m