Sign Up!
Login
Welcome to Test-paper.info
Thursday, June 22 2017 @ 05:30 PM CDT
 Forum Index >  Test Paper Related >  Primary 6 Matters
 P6 Maths Speed Question
   |  Printable Version
By: MathExcel (offline)  Saturday, September 21 2013 @ 11:13 PM CDT (Read 1234 times)  
MathExcel

Can you please help me with this question?

Q8) Suli and Magdalene took part in a marathon. When Magdalene covered 1/3 of the distance, Suli was 5.55km in front of her. Suli ran at an average speed of 18.5km/h and reached the finishing line at 9.30am. What time did Magdalene reach the finishing line if her average speed remained the same throughout the whole marathon?

Advanced thanks!!! Smile

Forum Newbie
Newbie


Registered: 09/21/13
Posts: 2

Profile Email    
   
By: verachen (offline)  Sunday, September 22 2013 @ 06:03 AM CDT  
verachen

Hi there . i have 10.20 am as my answer , is it correct ?

Forum Junior
Junior

Registered: 05/07/10
Posts: 15

Profile Email    
   
By: echeewh (offline)  Monday, September 23 2013 @ 05:37 AM CDT  
echeewh

Hey <MathExcel>

My take on this is 10.24 am

Cheers,
Edward

Forum Active Member
Active Member

Registered: 04/21/11
Posts: 623

Profile Email    
   
By: echeewh (offline)  Tuesday, September 24 2013 @ 07:03 AM CDT  
echeewh

Hello <verachen> and <<MathExcel>,

Following is my worked solution:

When M finished race and if S were to continue running, S would be ...
5.55 × 3 = 16.65 km ahead

time taken by S to run this distance
= 16.65 ÷ 18.5
= (9/10) hr = 54 mins

This will be the same time that M took to reach the finishing line from the point at 9.30am (when S reached / was at the finishing line)

Hence, time for M to reach finishing line
= 09 30 + 54 = 10 24

M reached the finishing line at 10.24 am

=======

Trust this helps.

Do let me know again if there's further clarification.

Cheers,
Edward



Forum Active Member
Active Member

Registered: 04/21/11
Posts: 623

Profile Email    
   


 All times are CDT. The time is now 05:30 pm.
Normal Topic Normal Topic
Locked Topic Locked Topic
Sticky Topic Sticky Topic
New Post New Post
Sticky Topic w/ New Post Sticky Topic w/ New Post
Locked Topic w/ New Post Locked Topic w/ New Post
View Anonymous Posts 
Able to Post 
HTML Allowed 
Censored Content