9 girls working 7 hours a day can complete a piece of work in 15 day. In how many days can 6 girls working for 9 hours a day, complete the same piece of work?
A) 35/4 days
B) 17.5 days
C) 19 3/4 days
D) 37/3 days
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answer I B
I think it is correct
9×7×15/6×9
=7×5/2
=35/2
=17.5
I think it is correct
9×7×15/6×9
=7×5/2
=35/2
=17.5
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