The marked price of a watch is Rs. 4,000. A shopkeeper sold it at 20% discount by making a profit of 5%. Find the cost price and
profit amount of the watch.

Step-by-step explanation:first of all we have to find discount amount by using the formula discount% of M.P then finding S.P using the formula M. P -S. P then finding the profit using the formula profit% of S. P and at last we have to find C. P using the formula S. P - profit.

I hope u will understand .

hawa xa explanation tei pani herea bujxa hola .

y=sec x is the correct answer

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cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x