7. An office opens at 10 a.m. and closes at 5 pm find the ratio of -
(i) lunch break to the total time,
(ii) lunch break to the working hours.
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Answer:1.Total working hours of office
= From 10 a.m. to 5 p.m.
= 7 hours
Lunch interval = 30 minutes
∴ Required ratio = 30 minutes : 7 hours
= 30 minutes : (7 × 60) minutes
= 1 : 14
2.Office hours
=10.30 AM to 5.30 AM=
i.e.,7hrs=420min.
Lunch time =30 min
420:30
14:1
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