Thread: Some Specific Problems of Profit and Loss and Marked Price and Discount I

Greetings all,

This morning, I was solving some problems dealing with Profit, Loss, Marked Price and discount. The below 4 problems really confused me. I would appreciate if anyone here guide me........

1. A man sells a bicycle at a gain of 10%. Had he bought it at 10%less, and sold it at $132 less, he would have still gained 10%. Find the cost price.

2. A trader uses 920g instead of 1kg and sells the articles at the marked price which is 15% above the cost price. Find the % profit.

Sincerely,
Abhijit. G.

Here is how I tried P #1

(R - C)/100 = 0.1

({R-132} - {C*0.90})/100 = 0.1

(R - C)/100 = ({R-132} - {C*0.90})/100
C*0.90 - C = R - 132 - R
C*0.90 - C = - 132
-0.1C = -132
C = -132/-0.1
C = 1320