A factory opens at 10 am and closed at 5 pm .There is a lunch time of 45 minutes only .Find out the ratio of (a) Lunch break to the total working hours . (b) Lunch break to the total factory hours.
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time 10 am to 5 pm
working time 7 hours
lunch 45 min
7:00 - 45 =6:15
1 hour =60 min
60min=60x6 = 360 min
360+ 15 =375 min
ratio
45:375 = 3:25
answer of a is 3: 75
B = 1 hour =60min
60min = 60×7 =420 min
ratio =45:420 =3:28
answer of b is 3:28
working time 7 hours
lunch 45 min
7:00 - 45 =6:15
1 hour =60 min
60min=60x6 = 360 min
360+ 15 =375 min
ratio
45:375 = 3:25
answer of a is 3: 75
B = 1 hour =60min
60min = 60×7 =420 min
ratio =45:420 =3:28
answer of b is 3:28
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