A seller offers a 40% discount on an item whose cost price is Rs. 720.

👍 Simple Solution:

📌 Given:

• Cost Price (CP) = ₹720
• Profit = 20%👉 Selling Price (SP):

$ SP = 720 + 20% \text{ of } 720 = 720 + 144 = 864 $

Discount = 40%

👉 That means:
$ SP = 60% \text{ of Marked Price (MP)} $

Step:

$ 864 = 60% \text{ of MP} $

$ 864 = \frac{60}{100} \times MP $

Solve:

$ MP = \frac{864 \times 100}{60} = 1440 $

⚠️ Wait — Check carefully 👇

$ 864 ÷ 0.6 = 1440 $

Final Answer:

👉 ₹1440

Quick Trick:

👉 When discount = 40%
➡️ SP = 60% of MP