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If 6 persons working 8 hours a day earn 8400 per week, then 9 persons working 6 hours a day will earn per week
(A) 8400
(B) 9450
(C) 16200
(D) 16800
(E) 17200
(A) 8400
(B) 9450
(C) 16200
(D) 16800
(E) 17200
23 Mar 2021, 18:00
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If 6 persons working 8 hours a day earn 8400 per week, then 9 persons working 6 hours a day will earn per week
Earnings per person per hour\(=\frac{8400}{6·8·7}=25\)
9 people working 6 hours a day per week=9·6·7=378 hours each week
Earnings for the week=378·25=9450
The calculations in this can be simplified: earnings per person per hour·hours worked total for the week
\(\frac{8400}{6·8·7}·9·6·7=\frac{(8400·9)}{8}=1050·9=9450\)
B
Earnings per person per hour\(=\frac{8400}{6·8·7}=25\)
9 people working 6 hours a day per week=9·6·7=378 hours each week
Earnings for the week=378·25=9450
The calculations in this can be simplified: earnings per person per hour·hours worked total for the week
\(\frac{8400}{6·8·7}·9·6·7=\frac{(8400·9)}{8}=1050·9=9450\)
B
