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Yakvenalex [24]

3 years ago

12

Two girls used the same number of beads to make a necklace. Farah used 2/5 of hers and Rani used 1/4 of hers. They had a total o

f 260 beads at first. How many beads did each girl use?

1 answer:

FinnZ [79.3K]3 years ago

8 0

Farah=52 rani=33 I think this is right

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Tom and Becky can paint Jim's fence together in 12 hours. If all people paint at the same rate, how many hours would it take to

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Answer: 8 hours

Step-by-step explanation:

Let x be the time taken by each person to paint the fence.

Given: Tom and Becky can paint Jim's fence together in 12 hours.

Since all people paint at the same rate, then we have the following equation ;-

$\dfrac{1}{x}+\dfrac{1}{x}=\dfrac{1}{12}\\\\\Rightarrow\ \dfrac{2}{x}=\dfrac{1}{12}\\\\\Rightarrow\ x=24$

Thus, the time taken by each person to paint the fence alone = 24 hours

Now, the time taken by all three paint together:-

$\dfrac{1}{t}=\dfrac{1}{24}+\dfrac{1}{24}+\dfrac{1}{24}\\\\\Rightarrow\ \dfrac{1}{t}=\dfrac{3}{24}\\\\\Rightarrow\ t=\dfrac{24}{3}=8\text{ hours}$

Hence, it would take 8 hours if all three paint together.

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