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Q.

In an office the working hours are 9.30 AM to 4.30 PM 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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a

14:1

b

1:14

c

7:30

d

30:7 

answer is A.

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Detailed Solution

Concept- The timings should first be converted into hours using the rule of thumb that one hour is equivalent to sixty minutes. then calculate the proportion of office hours to lunchtime. So, make advantage of this idea to find a solution to the issue.
 9.30 AM to 4.30 PM, or seven hours, are the whole working office hours.
applying the conversion to convert the working office hours into minutes Question Image,
Question Image.
Lunch took place for 30 minutes.
So, the ratio of office hours to lunchtime is Question ImageHence, the correct answer is option 1,
 
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