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eduard
2 years ago
13

What is 21 times 15 in standard algorithm

Mathematics
2 answers:
ValentinkaMS [17]2 years ago
3 0
<h3>que cada diarepe s it                   t </h3>
Dominik [7]2 years ago
3 0

21 \times 15
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A goods train runs at the speed of 72 kmph and crosses a 250 m long platform in 26 seconds. What is the length of the goods trai
Flauer [41]

The length of the goods train is 270 meters.

Given that, a goods train runs at the speed of 72 kmph and crosses a 250 m long platform in 26 seconds.

<h3>What is the distance formula with speed and time?</h3>

Speed is defined as the rate at which an object moves from one place to another in a given interval of time. It is a scalar quantity as it defines only the magnitude not the directions of an object moving. The S.I. unit of speed is m/s.

The speed of a moving object can be calculated as Speed = Distance / Time.

Now, to convert km/h to m/sec multiply the measure by 5/18.

That is, 72 × 5/18 = 20 m/sec

Let the length of the train be x metres.

So, then (x+250) / 26 = 20

⇒x+250=520

⇒x=270 meters

Therefore, the length of the goods train is 270 meters.

To learn more about the speed visit:

brainly.com/question/7359669.

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5 0
1 year ago
Carmen is making gift boxes for her friends. It takes her 10 minutes to pack a 4-pound treat box, and it takes her 15 minutes to
Darya [45]

Answer:

(5.2) for sure

Step-by-step explanation:

4 0
2 years ago
Solve each system of equations <br> 2x- 5y = 7<br> 3x - y = -9
Darina [25.2K]

Answer:

x = -4; y = -3

Step-by-step explanation:

2x - 5y = 7

3x - y = -9

Rewrite top equation. Multiply both sides of bottom equation by -5. Add equations. This eliminates y, and we solve for x.

         2x - 5y = 7

(+)   -15x + 5y = 45

----------------------------

      -13x         = 52

Divide both sides by -13.

x = -4

Substitute -4 for x in the first original equation and solve for y.

2x - 5y = 7

2(-4) - 5y = 7

-8 - 5y = 7

-5y = 15

y = -3

Answer: x = -4; y = -3

-5 =

8 0
3 years ago
Find the area of a rectangle that is 5.8 cm long and 1.2 cm wide
Svetlanka [38]
<h2><em>6.96cm^2.</em></h2><h2><em>5.8 x 1.2 = 6.96cm^2.</em></h2>
5 0
3 years ago
Read 2 more answers
Pete has a 15-foot ladder. The safety instructions recommend he should have the base of the ladder 6 feet from the base of the w
AnnyKZ [126]

Answer:

tbh i think it equals 9

Step-by-step explanation:

5 0
3 years ago
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