In an office the working hours are 9:30 AM to 4:30 PM and in between 20 minutes are spent on lunch Find the ratio of office hours to the time spent for lunch-
21:1
7:30
30:7
1:14
A
21:1
B
30:7
C
1:14
D
7:30
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Solution
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The correct option is A21:1 Total time in office =9:30to4:30=7hours
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