If the height of a cylinder is increased by 15% and the radius of its base is decreased by 10%, then by what percent will its curved surface area change?

A student scored 32 percent and failed by 6 marks. If he had scored 36 percent marks, he would have passed by 2 marks. What is the passing mark?

A team played 40 games in a season and won 24 of them. What percent of games played did the team win? 

The ratio of 45% of 80% of A to 30% of 40% of B is 15: 4. If the average of A and B is 67.5, what is the value of AB?

If 8% of x is the t same as 4 % of y, then 20% of x is the same as:

If C.P of 20 tables is equal to the S.P of 25 tables. Find the loss percentage.

The population of a city is 48,600. If there is a 25% increase in the first year and a reduction of 8% in the second year, then what will be the population of this city at the end of 2 years?

If the present population of a village is 55,566, which was 35000 2 years ago, then find the rate of increase of population per year.