[Show all top banners]

syanjaali
Replies to this thread:

More by syanjaali
What people are reading
Subscribers
Subscribers
[Total Subscribers 1]

BABAL Khate
:: Subscribe
Back to: Kurakani General Refresh page to view new replies
 Math : How to create a eaquation?
[VIEWED 5163 TIMES]
SAVE! for ease of future access.
Posted on 03-31-11 12:10 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Answer is 8 and 6 hrs drove 360 miles. How to create a equation?

Question: A truck is driving 45mph and a car is traveling at 60 mph.  The car and the truck are traveling the same distance.  The truck travels 2 hours longer than the car.  How many hours did each travel?



 
Posted on 03-31-11 12:19 PM     [Snapshot: 8]     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Let, x b hrs truck drove. so in x hrs, truck covered: 45*x miles
since car drove 2 hrs less than x, car covered: 60* (x-2) miles

as u mentioned, both covered equal distance:
45*x=60* (x-2)
ie, x = 8 hrs
x-2 = 6 hrs
miles covered = 6*60 or 8*45 = 360 miles


 
Posted on 03-31-11 12:20 PM     [Snapshot: 2]     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Velocity=Distance travelled/ time taken
V=D/T
Thus, T=D/V

Given, V(truck)=45 mph
V(car)=60 mph.
Assume they both travel D miles of distance.

Say, the Truck takes X hours to finish the distance of D miles.
Then X = D/45
(Hrs = Miles / Miles/Hr)

Also, say the car takes Y hours to travel the same distance D.
Then Y= D/60
Then Y (hrs) = D (miles)/ 60 MPH

We also know the truck travels 2 hrs longer.
Thus X=Y+2

Putting all together,

D/45= (D/60)+2

or,
(4D-3D)/180 = 2
Thus D=360 miles.

Then the truck travelled, X hrs = D/45 = 360/45 = 8 hrs.

And the car travelled,
Y=D/60 = 360/60=6 hrs.





 
Posted on 03-31-11 12:23 PM     [Snapshot: 14]     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Always calculate interms of D=RxT!

 
Posted on 03-31-11 12:58 PM     [Snapshot: 43]     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

After hours of घोत्ल्याइ and your answer give me idea  , Can we do this way? x  for truck and y for car.
As per Stiffer , 45x=60y
                              x= y+2


45 x   -  60y   =     0
      x   -      y   =    2
--------------------------
For American High School children have to be simplest way ( they can not understand certain math).

Last edited: 31-Mar-11 01:09 PM

 
Posted on 03-31-11 1:03 PM     [Snapshot: 55]     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

While they are in equation form, I thought my answer would be more easier to understand, no?

By the way, the second equation is wrong.
X=y+2 (truck travels 2 hrs longer).
Thus X-Y=2 (not -2)
 
Posted on 04-01-11 3:05 PM     [Snapshot: 202]     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Thank you all for your input. Student liked the way Stiffer explained, higher grade with math interest student  liked NAS, I thought  I came wth the simplest form , without explanation , just did as I did to pass the EXAM.
Thank you agian.


 


Please Log in! to be able to reply! If you don't have a login, please register here.

YOU CAN ALSO



IN ORDER TO POST!




Within last 365 days
Recommended Popular Threads Controvertial Threads
TPS Re-registration case still pending ..
TPS Re-registration
What are your first memories of when Nepal Television Began?
निगुरो थाहा छ ??
ChatSansar.com Naya Nepal Chat
Basnet or Basnyat ??
NRN card pros and cons?
Sajha has turned into MAGATs nest
Toilet paper or water?
TPS EAD auto extended to June 2025 or just TPS?
tesla stock OMG !!
Those who are in TPS, what’s your backup plan?
Biden out, Trump next president, so what’s gonna happen to TPS, termination?
and it begins - on Day 1 Trump will begin operations to deport millions of undocumented immigrants
मन भित्र को पत्रै पत्र!
Will MAGA really start shooting people?
Democrats are so sure Trump will win
I hope all the fake Nepali refugee get deported
From Trump “I will revoke TPS, and deport them back to their country.”
Tourist Visa - Seeking Suggestions and Guidance
Nas and The Bokas: Coming to a Night Club near you
Looking for girl
NOTE: The opinions here represent the opinions of the individual posters, and not of Sajha.com. It is not possible for sajha.com to monitor all the postings, since sajha.com merely seeks to provide a cyber location for discussing ideas and concerns related to Nepal and the Nepalis. Please send an email to admin@sajha.com using a valid email address if you want any posting to be considered for deletion. Your request will be handled on a one to one basis. Sajha.com is a service please don't abuse it. - Thanks.

Sajha.com Privacy Policy

Like us in Facebook!

↑ Back to Top
free counters