Question

a bought a thing for rs 9000 and sold it to B at 20% profit.B sold it to C at 10% loss.find the cost price of c

Answer 1

CP of A = 9000

SP of A = 9000 + 20% of 9000 = 9000 + 1800 = 10800

Now, SP of A will be CP of B

So, CP of B = 10800

SP of B = 10800 - 10% of 10800 = 10800 - 1080 = 9720

SP of B will be CP of C = 9720

Answer 2

Answer:

P=20%=120/100

L=10%=90/100

cp of c is =cp of A×B's profit×C's loss.

9000×120/100×90/100

=810×12

=9720.