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
KIM [24]
1 year ago
11

A train goes from springfield, MA, to boston at 40 mph. On the way back, it returns with a speed 80 mph. If it takes an hour les

s time to return, what is it's average speed?
Mathematics
1 answer:
alina1380 [7]1 year ago
4 0

The average speed for the entire journey will be 53.333 miles per hour.

<h3>What is the average speed?</h3>

The average speed is the ratio of the total distance traveled to the total time taken by the body. Its unit is m/sec.

The distance from the Springfield, MA, to Boston is, L

v₁ is the velocity during traveling from Boston to Springfield, MA

v₂ is the  velocity during traveling from Springfield, MA to Boston

t₁ is the time needed to travel from Boston to Springfield, MA

t₂ is the time needed to travel from Springfield, MA to Boston

t is the total time period of the journey

v is the average speed

From the formula of distance;

Distance = speed × time

The speed of train for the going from Springfield, MA, to Boston is 40 mph. The time period is calculated as;

L = v₁ × t₁

t₁ = L/v₁

t₁ = L/40

The speed of train for the going from Boston to Springfield, MA, is 80 mph. The time period is calculated as;

L = v₂ × t₂

t₂ = L/v₂

t₂ = L/80

The total time is taken;

t = t₁ + t₂

t =  (L/40)+( L/80)

t=3L/80

The ratio of total distance traveled to the total time spent by the body is known as average speed, calculated as;

Average speed = Total distance / Total time

v = 2L / (3L/80)

v= (2L × 80)/3L

v = 160 / 3

v = 53.333 miles per hour.

Hence the average speed for the entire journey will be 53.333 miles per hour.

To learn more about the average speed, refer to the link;

brainly.com/question/12322912

#SPJ1

You might be interested in
Brainliest to correct answer, hurry please!
omeli [17]

company A :

30,000 + 0.03(37499) = 31124.97...sales less then 37500

30,000 + 0.03(37501) = 31125.03....sales exceed 37500

30,000 + 0.03(249000) = 37470 ...sales less then 250000

30,000 + 0.03(251000) = 37530....sales exceed 250000


company B :

25,000 + 0.05(37499) = 26874.95...sales less then 37500

25,000 + 0.05(37501) = 26875.05...sales exceed 37500

25000 + 0.05(249000) = 37450...sales less then 250000

25,000 + 0.05(251000) = 37550...sales exceed 250000


so i believe your answer is option b,

company A pays better when sales are less then 250,000, but company B pays better when sales exceed 250,000 <==



5 0
3 years ago
Plss answer my question now i need it this friday​
professor190 [17]
Hello! i can do the first word problem

first we need to divide 600/3 which is 200.
therefore we can infer that he does 200 letters an hour and we can solve the problem with this

200 x 7 = 1400 letters an hour
6 0
2 years ago
Find the equation of the line whose slope is -3 and which passes through the point (-5, 3)
nadezda [96]

Answer:

y=-3x-12

Step-by-step explanation:

Plug into equation y=mx+b

3=(-3)-5+b

Simplify

3=15+b

Subtract 15 from both sides

-12=b

Add slope and y-intercept into base equation

y=-3x-12

4 0
3 years ago
Please help!! Will give BRAINLIEST!
aniked [119]
D is correct for this problem
4 0
2 years ago
Read 2 more answers
Graph the inequality. y&gt;|x+5|-3
BlackZzzverrR [31]

Answer:

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • What is the surface area of the figure shown?
    14·1 answer
  • Write the equation of a line in y =mx+b<br> form that has a slope of 3/4 and a y-intercept of 0.
    14·1 answer
  • In a particular year, approximately 1.7 million people took the mathematics section of a college achievement test. Of these, 44%
    7·1 answer
  • What is the rounding or compatible sum of 18+53
    7·1 answer
  • What is the area of the shape below.
    13·2 answers
  • Find x<br> Find the measure of the indicated angle.
    12·2 answers
  • QUICK HELP HURRY MAKRIMG PIEPLE AS BRIANLDIT
    10·2 answers
  • Andy has $ 200 to buy a new TV . One- forth of that money came from his grandmother and he saved the rest . How much money did A
    11·2 answers
  • The cost of 7 scarves is $61.25. What is the unit price?
    13·2 answers
  • Which statement is true regarding the functions on the graph?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!