When the price of an article is increased by `p%,` then quantity of sales decrease by `10%` but sales revenue increases by `10%` Find p.

When the price of an article is increased by 15% the number of articles aold decreases by 20% What is the percentage change in the sales revenue? (Sales revenue = piece of each article X number of articles sold).

The price of wheat, per kg, is increased by 17.5% and the quantity of wheat bought is decreased by 10%. What is the percentage change in the amount spent on wheat?

The price of two articles are in the ratio of 4 : 3 respectively. The price of first article is increased by 50% and the price of second article is decreased by 10%. If the new price of second article is ₹54, then what was the original price of first article?

The price of wheat ,per kg , is increased by 17.5% and the quantity of wheat bought is decreased by 10% .What is the percentage change in the amount spent on wheat ?