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UNO [17]
4 years ago
15

45 men can construct a road 21cm in 60 days.What length would be constructed by 72 men in 50 days?​

Mathematics
1 answer:
igor_vitrenko [27]4 years ago
5 0

Answer:

45-21cm

1-x

\frac{21}{45}

\frac{21}{45}  - 60 \\ x - 1

\frac{21}{45}  \times  \frac{1}{60}  =  \frac{21}{2700}

\frac{21}{2700}  \times 50 \times 72 =  \frac{75600}{2700}  = 28

they can construct 28cm

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If the crane operator works 30 years and the train engineer works 33 years, who makes the most lifetime income? How much more?
antiseptic1488 [7]

Answer:

The train eingineer.

Step-by-step explanation:

So, to find the lifetime income, we must multiply the annual income by the years of work.

So for the cran operator:

54,830*30

=

1,644,900

Now lets compare this to the train eingineer:

50,610*33

=

1,670,130

So looking at the two numbers:

<u>1,670,130(train eingineer)</u>>1,644,900(crane operator)

So the trian eignineer makes more than the crane operator.

Now lets find the amount.

To do this, lets subtract the larger value by the smaller value:

1,670,130-1,644,900

=

<u>25,230</u>

So the train eingineer made 25,230 more dollars than the crane operator.

Hope this helps!

3 0
3 years ago
The product of two consecutive natural numbers is greater than their sum by 109. Find these numbers
Charra [1.4K]

Answer:

The numbers will be "11 and 12".

i believe

Step-by-step explanation:

x(x + 1) > x + x + 1 + 109     where x and x+1 are the 2 numbers.

x^2 + x > 2x + 110

x^2  - x - 110 > 0

(x - 11)(x + 10) > 0    The critical values are 11 and -10 but number must be natural

So the value of x is 11

The numbers are 11 and 12

8 0
3 years ago
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e-lub [12.9K]

Answer:

3. x=50, y=80, 4. x=6.5, y=5

Step-by-step explanation:

I think, not entirely sure.

8 0
3 years ago
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Step-by-step explanation:

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