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January 31, 2015

January 31, 2015

Posted by **TUHITUHI** on Friday, August 10, 2012 at 5:14am.

- math -
**Reiny**, Friday, August 10, 2012 at 8:46amlet the amount of rice at rs.60 be x kg

let the amount of rice at rs.40 be y kg

60x + 40y = 10000 ---> 3x+2y = 500

50(x+y) = 11000 -----> x+y = 220 or y = 220-x

sub back into the 1st

3x + 2(220-x) = 500

3x + 440 - 2x = 500**x = 60 , then y = 220 - 60 = 160**

check:

60(60) + 160(40) = 10000 , check!

50(220) = 11000 , check!

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