Answer:
[tex] \bold{1) 2 \frac{2}{5} hours} \\ 2)36 \: hours}[/tex]
Step-by-step explanation:
to understand this
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let's solve:
in 4 hours Maria weve 1 basket
in 1 hour Maria weve ¼ basket
in 6 hours Ju lia weve 1 basket
in 1 hour J ulia weve ⅙
in 1 hour Maria and J ulia can weve
[tex] \sf \frac{1}{4} + \frac{1}{6} \\ \sf = \frac{6 + 4}{24} \\ = \sf \frac{10}{24} \\ \sf \frac{5}{12} [/tex]
[tex]\frac{5}{12}[/tex] basket can be weved in 1 hour by Maria and J ulia
1 basket can be weved in
[tex] \sf 1 \div \frac{5}{12} \\ \sf 1 \times \frac{12}{5} \\ \sf2 \frac{2}{5} \: hours [/tex]
by Maria and J ulia
therefore
15 basket can be weved in
[tex] \frac{12 \times 15}{5} \\ 12 \times 3 \\ 36 \: hours[/tex]
