5boys or 3girl can do a science project in 40 days.How long will it take for 15boys and 6 girls to do the the same project?
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8 days
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they given
5 boys and 3 girls can do a project up to 40 days
how much did take time for do a project 15 boys and 6 girls=?
5 boys = 40 days
15boys=3x40 days= 120 days
so,boys will do 120 days
3 girls=40 days
6girls=40x2=80 days
so,boys=120 days
so,girls=80 days
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