Question

By feeling a pen for 42, Nikhil makes a profit of 5%. How did it cost him?​

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

cp=100/100+5*sp

this is the formula let's put the values

100/105*42

if you solve this you will get the answer which is 40 ruppees

Nikhil buy for 40 and sell for 42