All categories

3 years ago

A train covers a distance of 456 km in 4hours 45 minutes. Calculate the speed of the train .

1 answer:

5 0

By definition we have to:
v = d / t
Where,
v: speed
d: distance
t: time
The time in hours is given by:
t = 4 + (45/60)
t = 4.75 hours
Substituting values we have:
v = 456 / 4.75
v = 96 km / h
Answer:
the speed of the train is:
v = 96 km / h

You might be interested in

Please help me with this math question. Max reward to proper answer

Zanzabum

Answer:

b there is no soulotion...

5 0

3 years ago

Read 2 more answers

15 cm <br> 7.5cm<br> 10 cm<br> 5 cm

Schach [20]

Answer:

7.5 = OM

Step-by-step explanation:

Since this is a right triangle, we can use trig functions

sin theta = opposite side / hypotenuse

sin 30 = OM / UN

sin 30 = OM / 15

15 sin 30 = OM

7.5 = OM

4 0

3 years ago

Simplify (5^x+2-5^x)/5^x×4

murzikaleks [220]

Answer:

Step-by-step explanation:

The given expression is,

$\frac{5^{x+2}-5^x }{5^x\times4}$

Now, we know that,

$a^{m+n} = a^m . a^n$

Then,

$5^{x+2}=5^x . 5^2$

So,

$\frac{5^{x+2}-5^x}{5^x\times4}=\frac{5^x.5^2-5^x}{5^x\times4}$

Now, taking $5^{x}$ common from the numerator of the given expression, then

$\frac{5^{x+2}-5^x}{5^x\times4}=\frac{5^x(5^2-1)}{5^x\times4}$

$\implies\frac{5^{x+2}-5^x }{5^x\times4}=\frac{5^2-1}{4}$

$\implies\frac{5^{x+2}-5^x}{5^x\times4}=\frac{5\times5-1}{4}=\frac{25-1}{4}$

$\implies\frac{5^{x+2}-5^x}{5^x\times4}=\frac{24}{4}=6$

So, the simplified form of the given expression gives the result 6.

8 0

4 years ago

What is the angle of rotation of this regular decagon? What is the measure of an interior angle?

SCORPION-xisa [38]

A decagon has 10 sides. If the polygon is symmetrical, the angle of rotation is given by the following equation:

360 / (number of sides)

Therefore,

360 = 10 = 36.

The interior angles are determined by the following equation:

180 - (angle of rotation)

Therefore,

180 - 36 = 144

The answer is A.

7 0

3 years ago

Brainliest HELP..

Maurinko [17]

Answer:

Step-by-step explanation:

$ratio=4:1\\(\frac{mx_{2}+nx_{1}}{m+n},\frac{my_{2}+ny_{1}}{m+n})\\\\(\frac{4*13+1*3}{4+1},\frac{4*-15+1*-5}{4+1})\\\\(\frac{52+3}{5},\frac{-60-5}{5})\\\\(\frac{55}{5},\frac{-65}{5})\\\\=(11,-13)$

6 0

3 years ago