A point is moving with uniform acceleration, in the eleventh and fifteenth seconds from the commencement it moves through 640 and 840 cms respectively, find its initial velocity, and the acceleration with which it moves?
1
135 cm/s, 60 cm/s2
2
100 cm/s, 45 cm/s2
3
90 cm/s, 60 cm/s2
4
115 cm/s, 50 cm/s2