For the following questions answer them individually
A salesperson, with a view to promote sales of an item, applies the priciple of simple interest. He declares that 300 pieces of the item can be obtained immediately against cash payment, but a customer will get only 200 pieces of the item if he defers the payment for a year. What is the rate percentage of interest on the whole?
A sum of ₹6,400 invested on the basis of yearly compounding of interest, grows to ₹7,056 in two years. What is the percentage rate of interest?
The total surface area of a solid right circular cylinder is 1617 $$cm^{2}$$. If the diameter of its base is 21cm, then what is its volume (in $$cm^{2}$$)? (Taken $$\pi=\frac{22}{7}$$)
The cost of manufacturing an item was ₹24,000, and 20% of it was spent on packaging and its shipment to a retailer. The manufacturer made a profit of 50%, while the retailer incurred a loss of 20% in selling it to a customer. At what price (in ₹) was the item sold by the retailer?
The number of students taking admission in first year of a degree course at a college in areas of Social Sciences in 2012 were as follows: Economics (SI)-96, Psychology (S2)-84, History (S3)-160, Political Science (S4)-120, Sociology (S5)-125. The break-up of students in different subjects has been presented through the given pie chart.
Study the pie chart and answer the question that follows.
The total number of students in Economics and psychology is what percentage of the total number of students in history, Political Science and Sociology (correct to two decimal places)?
The monthly maintenance amount of ₹ ______ payable by children to parents, set by the Maintenance and Welfare of Parents and Senior Citizens Bill, 2007, was removed by the Maintenance and Welfare of Parents and Senior Citizens (Amendment) Bill, 2019.