If the difference between the compound interest and the simple interest earned on a sum of money at the rate of 5% p.a. for two years is `4, what is the amount ?

person invests an amount of ` 10000 at the rate of 11 % per annum for two years. What approximate amount of compound interest will he obtain at the end of two years ?

A person has a certain number of hens and cows. If the total number of animal heads is 84 and the total number of feets is 256, how many cows does the person have ?

A plot of 5200 sq ft is avilable at the rate of ?48 per sq ft. If 17% of the total cost of the plot is to be paid for booking the plot, what is the booking cost ?

In an examination, it is required to score 32% of the aggregate marks for a student to pass the examination. A student scored 250 marks and was declared failed by 22 marks. What is the aggregate marks ?

A boy goes to the school from his village at the speed of 4 kmh_ 1 and returns back from the school to his village at the speed of 3 kmh1 . If he takes 1.4 hours in all, what is the distance between the village and the school ?