7. There are 4 geometric mean between 3 and 729. Find the sum of the G.P. . 1009 b. 1902 . 1092 d. 1902 8. The hour hand of a huge clock is 100cm long. What is the circumferential speed of the tip of this hand in cm/hr.? . 52.06 b. 51.36 . 52.36 d. 53.16 9. After how many minutes from 12:00 o'clock noon will the minute hand and the hour hand of the clock makes and angle of 120degrees for the first time. . 21.08min b. 28.01min . 18.01min d. 21.8min 10. At what time after 12:00 o'clock midnight will the minute hand and the hour hand of a clock be on a straight line for the first time? . 12:31.7am b. 12:13.7am . 12:32.7am d. 12:37.2am