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A circular garden having a diameter of 20 m is surrounded by a concrete path that is 2 m wide. Calculate the percentage increase in area resulting from the addition of the path.

India's total land area constitutes approximately what percentage of the world's geographical area?

A mobile shop owner buys 10 boxes of mobiles for the price of 8 boxes from a wholesaler. If he sells each box at a 2% discount on its marked price, what is his profit percentage?

As per the 2011 Census, Uttar Pradesh contributed nearly what percentage to India's total population?

A vendor purchases 5 shirts at the marked price of 4 shirts. If he sells each shirt after giving an 8% discount on its marked price, what is his profit percentage?

A dealer first sells a dining table for ₹X, making a 20% profit. Later the marked price of the same table is raised to ₹1.8X and a festive discount of 30% is given on it. What is the new profit percentage?

A company produced 6000 chocolates at a total cost of ₹1,80,000. They distributed 600 chocolates free as samples. For the remaining chocolates they offered a 10% discount on the market price of ₹40 per chocolate, and additionally gave 1 chocolate free with every 19 sold. What is the profit or loss percentage?

A spherical balloon is inflated, causing its radius to grow by 5%. By what percentage does its surface area increase?

The area of an equilateral triangle increases by 21%. By what percentage did the side length increase?

An electronics store orders 180 portable speakers at a cost of ₹420 each. The owner plans to price them so that selling only 140 speakers would guarantee a 30% profit on the total investment. However, a local event leads to the sale of 155 speakers. If the remaining speakers have no resale value, calculate the store's actual profit percentage on the total investment.

A trader gave a 25% discount on the marked price but still earned a 15% profit. What percentage was the marked price above the cost price?

A container has an 80-litre mixture of milk and water in the ratio 3 : 1. 12 litres is removed and replaced with water. Then 12 litres is removed again and replaced with milk. What is the final percentage of water?

A rectangular lawn measures 60 m by 40 m. A 5 m wide path is constructed all around the inside of the lawn. What percentage of the lawn's area is occupied by the path?

If the selling price of an article is 85% of its marked price and the cost price is 75% of the marked price, what is the profit percentage?

A bookshop advertises: "Buy 3 books and get the 4th at 40% discount." If the marked price of each book is ₹500 and all books are priced the same, what is the effective percentage discount on the total purchase?

An angle of $\frac{2\pi }{3}$ radians represents what percentage of a full circle?

A container has 100 litres of a mixture of acid and water in the ratio 3 : 2. 10% of the mixture is taken out and replaced with water. This operation is repeated once more. What is the final percentage of acid in the mixture?