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sasho [114]
3 years ago
6

Help me

Mathematics
2 answers:
fenix001 [56]3 years ago
5 0

Answer:

2.4 hours for 1 basket

36 hours for 15 baskets

Step-by-step explanation:

The formula to determine the time working together is

1/a + 1/b = 1/c  where a and b are the times alone and c is the time together

1/4 + 1/6 = 1/c

Multiply each side by 12c since that is the common denominator

12c(1/4 + 1/6 = 1/c)

3c + 2c = 12

5c = 12

Divide by 5

5c/5 = 12/5

c =2.4 hours

This is the time for 1 basket working together

Now if they need to make 15 baskets together, multiply by 15

15 * 2.4 hours = 36 hours

Semenov [28]3 years ago
4 0

Answer:

\bold{1)  2 \frac{2}{5}   hours} \\ 2)36 \: hours}

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>
  • fraction
<h3>let's solve:</h3>

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

\sf \frac{1}{4}  +  \frac{1}{6}  \\  \sf   = \frac{6 + 4}{24}  \\ =   \sf  \frac{10}{24}  \\ \sf  \frac{5}{12}

\frac{5}{12} basket can be weved in 1 hour by Maria and J ulia

1 basket can be weved in

\sf 1 \div  \frac{5}{12}  \\  \sf 1 \times  \frac{12}{5}  \\  \sf2 \frac{2}{5}  \:  hours

by Maria and J ulia

therefore

15 basket can be weved in

\frac{12  \times 15}{5}  \\ 12 \times 3 \\ 36 \:  hours

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