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Elena-2011 [213]
3 years ago
8

A train 100 m long crosses a pole in 5 seconds.Find the speed of the train in kilometre per hour.​

Mathematics
1 answer:
In-s [12.5K]3 years ago
6 0

Answer:

\sf72  km/h

Step-by-step explanation:

Distance covered by the train in crossing the pole = 100 m.

\sf Time \:  taken=5 \:  seconds

\sf \: Speed  \: of \: the \: train =  \frac{Distance }{Time}

\sf =  \frac{100}{5} \:  m/s

\sf \:  = 20 \: m/s

\sf \: =  20 \times \frac{18}{5}  \: km/h

\sf = 72 \: km/h

  • Hence, the speed of the train is 72 km/h
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<u>Part 2</u>

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We need to make sure the radical is defined, meaning the radicand has to be non-negative. Thus,

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Solve the equation 3(x−4)=12x .
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Step-by-step explanation:

3 0
3 years ago
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ira [324]

Volumen of A Solid

Given a solid with a shape of a constant base B and height H, the volume is:

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The base consists of a larger rectangle from which has been taken a smaller rectangle.

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The smaller rectangle has dimensions of 2 1/2 ft by 4 ft.

The second dimension was calculated as the difference between 9 ft and 2 ft plus 3 ft. (9 ft - 3 ft - 2 ft = 4 ft).

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B = 44 square feet.

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3 0
1 year ago
CAN SOMEONE PLEASE HELP ME WITH THIS QUESTION
Murljashka [212]

Answer:

The value of DC is 66.34.

Step-by-step explanation:

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The measure of ∠C is 30°.

Then the measure of angles BCA and ACD will be 15° each.

The measure of angle DAB is 150°.

Then the measure of angles DAC and BAC will be 75° each.

Now consider the right angled triangle ABC.

The measure of side AC is:

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Consider the right angled triangle DCA.

The angle DAC measure 75°.

Using the trigonometric identities compute the value of Perpendicular DC as follows:

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Thus, the value of DC is 66.34.

7 0
3 years ago
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