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Mars2501 [29]
2 years ago
8

70 men constructed 150 meter long wall in 12 days so as hoy many person construct 600 meters long wall in 30 days

Mathematics
1 answer:
Step2247 [10]2 years ago
7 0

112 men construct 600 meters long wall in 30 days.

What is Time and Work formula?

\frac{M_1\times D_1}{W_1}=\frac{M_2\times D_2}{W_2}

We can find the number of persons who can construct 600 meters wall as shown below:

Here, M_1=70

D_1=12

W_1=150

W_2=600

D_2=30

We have to find M_2

Putting in formula

\frac{70 \times 12}{150}=\frac{M_2\times 30}{600}

M_2=\frac{70\times 12\times 600}{150\times 30}

M_2=112

Hence, 112 men can construct 600 meters wall in 30 days.

Learn more about Time and Work here:

brainly.com/question/16933248

#SPJ4

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Solve for n: <br> 4+ n/3 &lt;6
Goshia [24]

Answer: n < 6

Step-by-step explanation:

multiply both sides.

4 + n/3 < 6

move the constant to the right.

12 + n < 18

calculate.

n < 18 - 12

solution:

n < 6

7 0
3 years ago
A red die is tossed and then a green dieis tossed. What is the probability thatthe red die shows a six or the green dieshows a s
mr_godi [17]

Let's call the event of the red die to show a six as event A, and the event of the green die to show a six as event B.

The theoretical probability is defined as the ratio of the number of favourable outcomes to the number of possible outcomes. On both dices, we have 6 possible outcomes(the numbers from 1 to 6), with one favourable outcome(the number 6), therefore, the probabilities of those events are:

P(A)=P(B)=\frac{1}{6}

Each roll is independent from each other, then, the probability of both events happening simultaneously is given by their product:

P(A\:and\:B)=P(A)P(B)

Using the additive rule of probability, we have the following equation for our problem:

\begin{gathered} P(A\:or\:B)=P(A)+P(B)-P(A\:and\:B) \\ =P(A)+P(B)-P(A)P(B) \\ =\frac{1}{6}+\frac{1}{6}-\frac{1}{6^2} \\ =\frac{2}{6}-\frac{1}{36} \\ =\frac{12}{36}-\frac{1}{36} \\ =\frac{12-1}{36} \\ =\frac{11}{36} \end{gathered}

the probability that the red die shows a six or the green die shows a six is 11/36.

7 0
1 year ago
Instead of having 1.5 times as many pink flowers as white
elena55 [62]

Answer:

The first row has 4 pink flowers and 2 white flowers

The second row has 6 pink flowers and 3 white flowers

The third row has 8 pink flowers and 4 white flowers.

Step-by-step explanation:

Based on the above question,

Molly has decided to plant a garden with twice as

many pink flowers as white flowers per row.

We can find the number of white flowers in each row by using the principle of ratio to solve this question.

Mathematically, what Molly planted is expressed as:

2 pink flowers : 1 white flower

Therefore for the three rows:

a. The first row is 4 pink flowers

Since, 2 pink flowers : 1 white flower

2 pink flowers = 1 white flower

4 pink flowers = designated as y

We cross multiply

2× y = 4 × 1

Divide both sides by 2

y = 4 ÷ 2

y = 2 white flowers.

Therefore, the first row that Molly planted 4 pink flowers has 2 white flowers.

b. The second row, Molly planted 6 pink flowers

Since, 2 pink flowers : 1 white flower

2 pink flowers = 1 white flower

6 pink flowers = designated as z

We cross multiply

2× z = 6 × 1

Divide both sides by 2

z = 6 ÷ 2

z = 3 white flowers.

Therefore, the second row that Molly planted 6 pink flowers has 3 white flowers.

c. The third row , Molly planted 8 pink flowers

Since, 2 pink flowers : 1 white flower

2 pink flowers = 1 white flower

8 pink flowers = designated as p

We cross multiply

2× p = 4 × 1

Divide both sides by 2

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y = 4 white flowers.

Therefore, the third row that Molly planted 8 pink flowers has 4 white flowers.

Therefore, since Molly has decided to plant a garden with twice as

many pink flowers as white flowers per row,

The first row has 4 pink flowers and 2 white flowers

The second row has 6 pink flowers and 3 white flowers

The third row has 8 pink flowers and 4 white flowers.

6 0
3 years ago
Read 2 more answers
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MrRa [10]
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Answer:

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