Please wait...
1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days
8104911739
For Business Enquiry

or

Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this toll free number

022-62211530

Mon to Sat - 11 AM to 8 PM

Home / Doubts and Solutions/ICSE/Class 9/Mathematics

In 8 hrs C walks 3 Km more than D does in 6 hrs and in 7 hrs D walks 9 Km more than C does in 6 hrs;  how many kilometere does each walk in an hour?

Asked by Asfaque 8th May 2016, 10:53 PM
Answered by Expert
Answer:
Let space space straight C space walks space straight x space km space in space 1 space hour space and space straight D space walks space straight y space km space in space 1 space hour In space 8 space hrs space straight C space walks space 3 space Km space more space than space straight D space does space in space 6 space hrs 8 straight x space minus space 6 straight y space equals space 3......................... left parenthesis straight i right parenthesis space In space 7 space hrs space straight D space walks space 9 space Km space more space than space straight C space does space in space 6 space hrs 7 straight y space minus space 6 straight x space equals space 9......................... left parenthesis ii right parenthesis Adding space eq space left parenthesis straight i right parenthesis space and space left parenthesis ii right parenthesis space we space get space 2 straight x space plus space straight y space equals space 12 straight y space equals space 12 space minus space 2 straight x................. left parenthesis iiii right parenthesis Substitute space left parenthesis iii right parenthesis space in space left parenthesis straight i right parenthesis space we space get 8 straight x space minus 6 left parenthesis 12 space minus space 2 straight x right parenthesis space equals space 3 8 straight x space minus 72 space plus 12 space straight x space equals space 3 20 straight x space equals space 75 straight x space equals 15 over 4.............. left parenthesis iv right parenthesis Substitute space left parenthesis iv right parenthesis space in space left parenthesis iii right parenthesis space we space get straight y space equals space 12 space minus space 2 open parentheses 15 over 4 close parentheses straight y space equals 12 minus 15 over 2 straight y space equals space 9 over 2 Hence comma space straight C space walks space 15 over 4 space km space in space space one space hour space and space space straight D space walks space 9 over 2 space km space in space one space hour.
Answered by Expert 9th May 2016, 11:11 AM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Report an issue
Previous Question
Next Question
Your answer has been posted successfully!

Free related questions

How many tiles each of area 400 cm squared , will need to pave a footpath  which is 2m wide and surrounds a grass plot 25m longand 13m wide ? pllease reply fast.
8th January 2017, 6:12 PM
Perimeter of a rhombus is 46cm . If the height of rhombus is 8cm  find its area??
8th January 2017, 4:50 PM
Q.how many cubic cm of wood are there in a box,which measures 24cm by 22cm by 17cm,thickness of the wood is 1cm.
Please provide detailed explaination.
27th January 2017, 10:28 AM
A two digit number is obtained by multiplying the sum of digits by 8. Also it is obtained by multiplying the difference of digits by 14 and adding 2 . Find the number.
31st January 2017, 8:12 AM
When the greater of 2 numbers is increased by 1 divides the sum of the numbers the result is 3/2.When the difference of these numbers is divided by the smaller the result is 1/2. Find the number. 
31st January 2017, 8:48 AM
RELATED STUDY RESOURCES :
ICSE Class-9 QUESTION ANSWERS

Browse free questions and answers by Chapters

Trending Tags

linear equations tips and tricks arithmetic progression solution of the equation quadratic equation trigonometric ratios area compound interest volume irrational

Latest Questions

IIT JEE Main Chemistry
Q.no.59, Sir plz solve this as well as explain me how the answer could be 2 types of shape here..plz ellabrote all that!Thanks
qsnImg
Asked by vishakhachandan026 20th May 2019, 9:31 PM
NEET NEET Biology
Which of the following statements is correct? (1) Cornea is an external, transparent and protective proteinacious covering of the eye-ball. (2) Cornea consists of dense connective tissue of elastin and can repair itself. (3) Cornea is convex, transparent layer which is highly vascularised. (4) Cornea consists of dense matrix of collagen and is the most sensitive portion the eye.
Asked by ntg432000 20th May 2019, 9:07 PM
ICSE X Mathematics
Monica had RD account in the Union Bank of India and deposited rupees 600 per month . If the maturity value of this account it was rupees 24 930 and the rate of interest was 10 % per annum; find the time for which the account was held.
Asked by nishabr7 20th May 2019, 9:02 PM

Chat with us on WhatsApp