Question

in winters a school opens at 10 am and closes at 3.30 pm.if the lunch interval is of 30 minutes find the ratio of lunch interval to total time of the class period.

Answer 1

total hours between 10am and 3:30pm = 5.5hours

lunch interval=0.5 hours

total class period time=5.5-0.5=5

ratio of lunch interval to class time is

0.5/5=1/10

therefore the ratio is 1:10

Answer 2

The ratio of lunch interval to total time of the class period is  1 :  10.

Step-by-step explanation:

Given:

Total Time in the school  

= 5 hr 30 min =330 min      [ 1 hr = 60 min]

Lunch Time = 30 min

Total Time in the class periods,

= Total Time in the school - Lunch Time

= 330 - 30

= 300 min

Therefore, the ratio of lunch interval to total time of the class period,

= $\frac{30}{300}$

= $\frac{1}{10}$

Hence, the ratio is  1 :  10.