a shop keper made profit of 20% by seling 10 kg of rice for RS160 .what is per cost of rice ? plz solve it

asked Apr 7, 2014 in Quantitative Aptitude by aslam (107 points) 223 views

1 Answer

0 votes
Let the cost price of rice be X and the profit made on this will be X x 20/100.  Selling price would be X + X x 20/100 = 160.

X = 800/5 = Rs.133.33
answered Apr 7, 2014 by Shekhar (54 points)
Where doesthis 800 nd 5 come frm???
commented Apr 7, 2014 by aslam (107 points)
X + X x 20/100 = 160
X + X x 1/5 = 160
X + X/5 = 160
(5X + X)/5 = 160
6X/5 = 160
6X = 160 x 5
6X = 800
X = 800/6
X = 133.33
I hope now it is clear where from 800 and 6 came. By mistake 5 was typed.
commented Apr 7, 2014 by Shekhar (54 points)
thta wat i am talkin about
ok sir u hav solved it by  the symbol usin x bt in my book they had use the fomula of rate%=percentage\ base ...so can i solve it by ur method because ur method is vry ezy in my book so freaking complicated plzz tell me ?
commented Apr 7, 2014 by aslam (107 points)
Dear Aslam, this is the proper method.  No problems, you can solve this question in exams by this method.
commented Apr 7, 2014 by Shekhar (54 points)
sir i had not understnad the 4th portion how does this come ? (5x+x)\5
commented Apr 8, 2014 by aslam (107 points)
It has come because of addition of fractions by taking LCM.
commented Apr 8, 2014 by Shekhar (54 points)
160*120/100 i think this method is enough
commented Apr 8, 2014 by cheetah131 (0 points)
Dear Cheetah, it should be (160/120)X100 = 133.33
commented Apr 8, 2014 by Shekhar (54 points)
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