Problem Solving

R.k91 wrote:Zahid sells a watch to Abrar at a gain of 10% and Abrar sells it to Suhail at a gain of 5%. If suhail has to pay Rs.462 for it, the cost price of the watch for Zahid is???/

Let us assume cost price of the watch for Zahid is Rs. 100P
Hence, cost price for Abrar = (100P + 10% of 100P) = (100P + 10P) = 110P
Hence, cost price for Suhail = (110P + 5% of 110P) = (110P + 5.5P) = 115.5P

So, 115.5P = 462
--> 100P = 100*462/115.5 = (1000*462)/(11*105) = (1000*42)/105 = (1000*2)/5 = 200*2 = 400