In a school the the duration of primary section is 40 min and senior section is hour if the bell rings at 9 am together when will the next bell ring together

11 a.m.

Step-by-step explanation:

Duration of Primary Period = 40 min

Duration of Senior Section =1 hour = 60 min

To find out when the next bell will ring together, we first determine the LCM of 40 and 60.

Multiples of 40 are: 40,80,120,160,...

Multiples of 60 are: 60, 120, 180, 240...

From the above, we observe that the bell will ring together exactly 120 Minutes after 9 a.m.

Therefore:

9+120 Min =9 +2 Hours =11 a.m.

Therefore, the bell of the primary section and senior section will ring together at exactly 11 am.

answer

explanation

the area of a circle is calculated using the formula

or

we can use any of the above formulae to calculate the required. preferably, let us use the latter since the diameter is

we substitute the diameter into the formula to get:

this is the exact value for the area of the circle.

the correct answer is a

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11