Question

15. Vinod sells a watch at 10% profit. If he had bought it for 15% less and sold it for 18 less, he would have gained 20%. Find the cost price of the watch.​

Answer 1

let cp be 100x

sp = 110x

now cp is 85x

sp = 110x -18

85x*6/5 = 110x -18

102x = 110x- 18

8x = 18

x= 1800/8

x= 225

Answer 2

let cp be 100x

so= 110

now cp is 85x

sp= 110x-18

8x= 18

x= 1800/8

x= 225

Explanation:

x= 225