13. In a school, the bell for the primary section goes every 30 minutes and the bell for the middle school section goes every 45 minutes. If the school starts at 8:00 a.m., at what time will both the primary and the middle school sections start next periods together?हाय

13. In a school, the bell for the primary section goes every 30 minute

1.	13. In a school, the bell for the primary section goes every 30 minutes and the bell for the middle school section goes every 45 minutes. If the school starts at 8:00 a.m., at what time will both the primary and the middle school sections start next periods together?हाय
Answer» -step explanation:Time at which bell for all these section will ring together will be equal to the LCM of 30,40 and 45 2 \| 30, 40, 45 5 \| 15, 20, 45 3 \| 3 , 4 , 9 3 \| 1 , 4 , 3 2 \| 1 , 4 , 1 2 \| 1 , 2 , 1 1 , 1 , 1 LCM = 2 × 2 × 2 × 3 × 3 × 5 = 8 × 9 × 5 = 72 × 5 = 360 Hence all three bell will ring together after 360 min = 6 hr that is 3 PM HOPE THIS HELPEDPLS MARK AS BRAINLIEST