Answers

2014-11-15T21:47:16+05:30
We know that x - 20%x is 800$

(100x-20x)/100=800
80x=80000
x=80000/80
x = 1000

therefore, orignal price is 1000$
CP-D=SP
1000-D=800
D is -200 $

i.e. 200 $


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2014-11-15T23:13:38+05:30
Cp=sp-d =800-20% =800-20÷100 160 rps cp ans
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