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
pochemuha
3 years ago
6

Juan is participating in a 40 mile bike race. He will pedal at a steady rate of 11.5 miles per hour. He pedaled for 1 hour and 4

5 minutes with the wind and for 2 hours and 30 minutes against the wind and finished the race in 4 hours and 15 minutes. What was rate at which the wind was blowing in miles per hour?
Mathematics
1 answer:
Archy [21]3 years ago
7 0

To work this problem, you must assume that Juan's pedaling speed adds to the wind speed when going downwind, and that the wind speed subtracts from Juan's pedaling speed going upwind. (In other words, Juan's pedaling speed is relative to the air, not the ground.)

Let w represent the wind speed in miles per hour.

... distance = speed × time

Juan's total distance is 40 miles, so we have ...

... 40 = (11.5 +w)×1.75 + (11.5 -w)×2.50

... 40 = 48.875 - 0.75w . . . . . simplify

... -8.875/-0.75 = w . . . . . . . . subtract 48.875, divide by -0.75

... w = 11.833... = 11 5/6

The wind was blowing 11 5/6 miles per hour.

_____

Compared with real-life experience, and working through the details, this problem makes no sense whatever. Pedaling a bicycle is not like rowing a boat, where the current of the medium directly affects speed.

If you work through the segments of the problem, you find that Juan traveled 40.833 miles with the wind in the first 1.75 hours, so actually finished the race and then some. He spent the next 2.5 hours being blown backward by the wind, even though he was pedaling forward at 11.5 mph. (How much sense does that make?)

You might be interested in
Stacy goes to the county fair with her friends. The total cost of ride tickets Is given by the equation c = 3.5t, where c is the
murzikaleks [220]
C = 3.5t....when t = 15
c = 3.5(15)
c = 52.50 <==
5 0
3 years ago
By what number we multiply -7/16 so that the product may be 46/28
Aliun [14]

Answer:

The eq will be=-7/16 × x=46/28

x=46/28 ×-16/7

x=-192/49

3 0
3 years ago
If a line is 10 feet long but needs to be reduced to 80% of its original, how long will the new line be?
motikmotik

Answer:

8 feet

Step-by-step explanation:

6 0
3 years ago
What is 64×34+8-3? Solve.
borishaifa [10]
The answer is 2,181 because 64x34=2176+8=2184-3=2181
6 0
3 years ago
What is the value of x to the nearest degree?<br> A.32 <br> B.85<br> C.82<br> D.58
dangina [55]

Answer:

m∠x ≈ 32°

Step-by-step explanation:

We can see that we have to use tan∅ to solve this (opposite over adjacent)

tan(x) = 7/11

x = tan^-1 (7/11)

x = 32.4712

4 0
3 years ago
Read 2 more answers
Other questions:
  • Describe the transformation f(x) = √x + 1 − 5 in words. The parent function f(x) = √x has been shifted 1 unit and 5 units.
    5·1 answer
  • O.7 in simplest form
    9·2 answers
  • Find the distance using the modulus of the difference between z1 = -8 + 3i and z2 = 7 - 4i. Show all work for full credit.
    6·2 answers
  • 5(7 − 4)2 ÷ 3 + 11 =
    9·1 answer
  • PLEASE HELP ME
    13·2 answers
  • How to find the area of the seating area
    9·2 answers
  • Periodically a bottling company gets complaints that their bottles are not holding enough liquid. To test this claim the bottlin
    14·1 answer
  • Write each fraction or mixed number as a decimal. Use bar notation if needed. Please help and thank you.
    10·1 answer
  • the ratio of number boys to the number of girls in a choir is 7 to 5 there are 150 girls in the choir how many boys are in the c
    7·2 answers
  • Can someone plss help ASAP
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!