2 years ago

The lengths of three ropes are 4 : 5 : 9. If the length of the shortest rope is 20 cm, find the length of the longest rope

2 answers:

7 0

Answer:

Don’t quite me on it, but 45cm?

Explanation:

Well, if the shortest rope (4) is only 20cm, it’s about 5cm per length (?)

So, if you follow that pattern the longest (9) would be 45cm.

vfiekz [6]2 years ago

4 0

The answer is 45
If 20/4 = 5
Then 9x5 = 45

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There are 870 boys and 800 girls in a school

alina1380 [7]

Answer:

1060

Step-by-step explanation:

Given:

No. of boys = 870

No. of girls = 800

Probability that a boy chosen studies Spanish = $\dfrac{2}{3}$

Probability that a girl chosen studies Spanish = $\dfrac{3}{5}$

the number of boys in the school who study Spanish :

$\dfrac{2}{3}\times 870=290\times 2=580$

the number of girls in the school who study Spanish :

$\dfrac{3}{5}\times 800 \\=3\times 160\\\\=480$

Therefore, total number of students who study Spanish would be :

480+580=1060

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Marizza181 [45]

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3 years ago

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gregori [183]

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