A body thrown along a frictionless inclined plane of angle of inclination 30° covers a distance of 40 m along the plane. If the body is projected with the same speed at an angle of 30° with the ground, it will have a range of (take g=10 m/s²)?
(a) 20 m
(b) 20 √2m
(c) 2 sec
(d) 10 sec