In an office the working hours are to to and in between 30 minutes are spent on lunch. Find the ratio of office hours to the time spent for lunch.

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answer is C.

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Detailed Solution

Concept- The office opens at 10.30 AM (Ante meridiem) , which is before noon, and closes at 5.30 PM (Prime meridiem) , which is after noon. So, from 10.30 a.m. to 5.30 p.m., count the minutes and get the ratio of office hours to lunch time.
We are told that working hours at an office are 10.30 AM to 5.30 PM, with a 30-minute lunch break in between.
We must determine the ratio of office hours to lunchtime.
The office is open from 10.30 a.m. to 5.30 p.m.
So we have 1 hour and 30 minutes from 10.30 AM to 12.00 PM and 5 hours and 30 minutes from 12.00 PM to 5.30 PM. As a result, the total time is 1 hour

hours

hours
1 hour is equal to 60 minutes, so 7 hours is equal to

minutes.
Thus, office time is 420 minutes whereas lunch break is 30 minutes.
Now, ratio of office hours to time spent for lunch be

Hence, the correct option is 3 .

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