Welcome to Test-paper.info
Sunday, February 25 2018 @ 03:35 PM CST
 Select a Forum » General Chat » Primary 1 Matters » Primary 2 Matters » Primary 3 Matters » Primary 4 Matters » Primary 5 Matters » Primary 6 Matters » Question, Feedback and Comments » Education Classified
 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 1422 times)
MathExcel

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?

Newbie

Registered: 09/21/13
Posts: 2

 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 ?

Junior

Registered: 05/07/10
Posts: 15

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

Hey <MathExcel>

My take on this is 10.24 am

Cheers,
Edward

Active Member

Registered: 04/21/11
Posts: 627

 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

Active Member

Registered: 04/21/11
Posts: 627

 All times are CST. The time is now 03:35 pm.
 Normal Topic Locked Topic Sticky Topic
 New Post Sticky Topic w/ New Post Locked Topic w/ New Post
 View Anonymous Posts Able to Post HTML Allowed Censored Content