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Tuesday, August 22 2017 @ 01:43 PM CDT
 Forum Index >  Test Paper Related >  Primary 6 Matters
 Primart 6 Math Que (Ratio) - Help
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By: adilah9 (offline)  Saturday, February 04 2012 @ 10:23 PM CST (Read 853 times)  
adilah9

Salleh's money was 3 1/2 times his brother's money.
After his mother had given him $30 and his brother $90, Salleh then had twice as much money as his brother.
How much money had Salleh at first?

[In ratio]

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By: awyw1201 (offline)  Sunday, February 05 2012 @ 06:21 AM CST  
awyw1201

Quote by: adilah9

Salleh's money was 3 1/2 times his brother's money.
After his mother had given him $30 and his brother $90, Salleh then had twice as much money as his brother.
How much money had Salleh at first?

[In ratio]




use units and parts

Ratio at 1st----7u:2u
Ratio after---2p:1p

7u + 30 = 2p---(1)
2u + 90 = 1p---(2)

(2) x 2----4u + 180 = 2p----(3)

(1) - (3), we have 3u = 150
Thus, 1u = 50
7u= 350


Ans: $350

Big Grin

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By: adilah9 (offline)  Sunday, February 05 2012 @ 06:27 AM CST  
adilah9

Quote by: awyw1201

Quote by: adilah9

Salleh's money was 3 1/2 times his brother's money.
After his mother had given him $30 and his brother $90, Salleh then had twice as much money as his brother.
How much money had Salleh at first?

[In ratio]




use units and parts

Ratio at 1st----7u:2u
Ratio after---2p:1p

7u + 30 = 2p---(1)
2u + 90 = 1p---(2)

(2) x 2----4u + 180 = 2p----(3)

(1) - (3), we have 3u = 150
Thus, 1u = 50
7u= 350


Ans: $350

Big Grin



Thank you! Big Grin

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By: awyw1201 (offline)  Sunday, February 05 2012 @ 06:37 AM CST  
awyw1201

You are most welcome:-)

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