Q&A - PSLE Math

[youngtay]

Hi, MathIzzzFun


Thanks

[MathIzzzFun]

youngtay:

Hi, MathIzzzFun


Thanks

Hi

avec plaisir

cheers.

[HoSayLiao]

Can someone help with this question?


Ali has $300. He lost 1/3 of it and ends up with $200. To have the $300 again, he needs to win $100 which is ½ of the $200. 1/3 is known as the Losing Fraction (LF) and ½ is known as the Winning Fraction (WF). ½ times 1/3 = 1/6. 1/6 is the product of the LF and WF, known as the PLW. Find the LF and the WF if the PLW is 81/400.

[Hifive]

Hi


Need help with this question:

A motorist sets off from Town A for Town B.
If he travels at 60km/hr, he will reach Town B at 9.30am.
If he travels at 80km/hr, he will reach Town B at 8.45am
How far apart is Town A and Town B ?

Thanks in advance!

[carebear]

Hifive:

Hi


Need help with this question:

A motorist sets off from Town A for Town B.
If he travels at 60km/hr, he will reach Town B at 9.30am.
If he travels at 80km/hr, he will reach Town B at 8.45am
How far apart is Town A and Town B ?

Thanks in advance!

I only how to solve this question with algebra.

Let x be the distance between A and B.

If the motorist travels at the faster speed, he will take 45 minutes or 3/4h faster to reach B.

Time taken in hours to reach B if he travels at 60km/h is x/60
Time taken in hours to reach B if he travels at 80km/h is x/80

x/60 = x/80 +3/4

x= 180 km

Distance between Town A and Town B is 180 km.

[bobsg01]

:nailbite:


Another P6 math problem.

Thanks in advance for any help given.

http://i51.tinypic.com/34ii74m.jpg\">

[carebear]

bobsg01:

:nailbite:


Another P6 math problem.

Thanks in advance for any help given.

http://i51.tinypic.com/34ii74m.jpg\">

a) 24 km
b) 13.5 km/h

http://www.flickr.com/photos/63342911@N03/5770283724/
http://www.flickr.com/photos/63342911@N03/5770284336/

[bobsg01]

Thank you carebear. :rahrah:

[Hifive]

carebear:

Hifive:

Hi


Need help with this question:

A motorist sets off from Town A for Town B.
If he travels at 60km/hr, he will reach Town B at 9.30am.
If he travels at 80km/hr, he will reach Town B at 8.45am
How far apart is Town A and Town B ?

Thanks in advance!

I only how to solve this question with algebra.

Let x be the distance between A and B.

If the motorist travels at the faster speed, he will take 45 minutes or 3/4h faster to reach B.

Time taken in hours to reach B if he travels at 60km/h is x/60
Time taken in hours to reach B if he travels at 80km/h is x/80

x/60 = x/80 +3/4

x= 180 km

Distance between Town A and Town B is 180 km.

Hi carebear

Thanks for your solution.

[bobsg01]

:stupid:


P6 Math problem again.

Thanks in advance for the help provided.

http://i55.tinypic.com/jqnf60.jpg\">