Question

in a village the bell rings every 30 minutes at the junior school and every 45 minutes at the high school both schools start lessons at 8 a.m. if the high school bell ring 45 minutes how many times during the day with this bell ring at the same time as the Junior ​

Answer 1

12:00

Solution

Concept

• we know that, the bell will rings again at the same time will be LCM of their individual time.

Sum

LCM = 2 * 2 * 2 * 3 * 5 = 120 minutes.

Therefore

we can conclude that, both bells will ring again together after 120 minutes or 2 hours. 10AM + 2 hours = 12:00 noon.