Question

Rishi buys a water cooler at some price and sells it to Suni at 20% profit .Suni sells to Ramesh at 10% profit .Ramesh had bought it for Rs.6666.What was the CP for sumi?

Answer 1

Let c.p. of coolet for rishi be x

rishi sold it to suni at 20% profit, so

c.p. for suni = (20/100 × x) + x

= 20x +100x /100

=120x/100 or 12x/10

suni sold it for 10% profit, so

c.p. for ramesh = 12x/10 +( 10 × x/ 100)

= 12x/10 + x/10

=13x/10 or 6666

............Q/A

13x/10 = 6666

13x = 6666×10

13x = 66660

x = 66660/13 = 5127+9/13 or 5127.69

c.p for suni = 12x/10

=(12× 66660/13)/10......

Now buddy , calculate on your own.