1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lesantik [10]
3 years ago
7

A 1 km long train travelling at a speed of 60km/h enter a tunnel 1km long. What time will the train take to come out of the tunn

el fully.​
Mathematics
1 answer:
zysi [14]3 years ago
3 0

Answer:

2 minutes

Step-by-step explanation:

The front of the train enters the tunnel and travels 1 km before the rear of the train enters the tunnel.  Thus, the total distance traveled by the front of the train is 2 km, and this is covered in a certain number of hours:

Since distance = rate times time, time = distance / rate.  In this particular case we have:

                                              2 km

time = distance / rate = ------------------- = (1/30) hr

                                           60 km/hr

(1/30) hr converts to 2 minutes, since 1 hr = 60 minutes

You might be interested in
In FGH, the measure of H=90°, HF=91 feet, and GH = 50 feet. Find the measure of F to the nearest degree.
Rudik [331]

Given:

The angle of H=90°, HF=91 feet, and GH = 50 feet.

The objective is to find the measure of angle<em> F.</em>

In the given right angled triangle, the side opposite to the requierd angle is called opposite side, and the other smaller side is called adjacent side.

The trigonometry formula which relates with the opposite and adjacent side is,

\tan \theta=\frac{opposite}{adjacent}

Now substitute the value of opposite and adjacent in the above formula to find the value of angle <em>F</em>.

\begin{gathered} \tan \theta=\frac{50}{91} \\ \theta=\tan ^{-1}(0.549) \\ \theta=28.787^0 \\ \theta\approx29^0 \end{gathered}

Hence, the value of angle <em>F</em> is 29 degree.

3 0
1 year ago
Write an equation in slope-intercept form of the line with slope 3/4 that contains the point (-4,1)
marusya05 [52]

Answer:

y = 3/4x + 4

Step-by-step explanation:

to put it into slope intercept form, you need to find the y intercept or b becasue the slope intercept form is y = mx + b where b is the y intercetpt and m is the slope. To find b you insert the points you were given so 1 = -4(3/4) + b

which simplifies to 4 = b so then you can put in your slope and y intercept into slope intercept form

6 0
3 years ago
Find the geometric mean of 8 and 17
maria [59]
Oh gosh oh I thought had the president of the
5 0
3 years ago
-7x^2+10=185 how to solve
bonufazy [111]

Answer:

-7x²=185-10

-7x²=175

x²=-25

x=±√-25

6 0
3 years ago
The equation of line L is y=5x+1
vovikov84 [41]

Answer:

see explanation

Step-by-step explanation:

Parallel lines have equal slopes.

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

L₁ is y = 5x + 1 ← in slope- intercept form

with slope m = 5

L₂ is 2y - 10x + 3 = 0 ( subtract - 10x + 3 from both sides )

2y = 10x - 3 ( divide all terms by 2 )

y = 5x - \frac{3}{2} ← in slope- intercept form

with slope m = 5

Since L₁ and L₂ have equal slopes then they are parallel lines

3 0
3 years ago
Other questions:
  • Can you please help me with #7&amp;8 thanks in advance
    10·1 answer
  • If David earns $8/hr. plus 1.5 times his normal rate for any hours over 40, then how many hours of overtime each week does he ne
    7·1 answer
  • Which algebraic expression is a polynomial?​
    9·1 answer
  • Help fast plzzzzzzz :3
    8·1 answer
  • Not sure which one it is
    6·1 answer
  • Trey runs each lap in 6 minutes. He will run at least 30 minutes today. What are the possible numbers of laps he will run today?
    15·1 answer
  • Fran brings home $225 per week working 15 hours of which she is able to save $40. Fran wants to have $1,400 saved at the end of
    5·1 answer
  • What is the value of s?
    9·1 answer
  • Can you guys do all of them I will BRAINLIST YOU ITS DUE TOMORROW
    7·1 answer
  • Please help this is paint BRAINLIEST AND HIGH POINTS for correct answer :(
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!