Find the sum of money which must be invested at simple interest for 8 months at 6% per annum in order to earn ₹250 as interest.
The cash difference between the selling prices of an article at a profit of 8% and at a loss of 4% is ₹54. Find the cost price of the article.
A certain number of identical spheres are formed by melting a large sphere of radius 28 cm. What is the number of small spheres formed if the surface area of each small sphere is 2464 cm²?\(\text{(Use }\pi = \tfrac{22}{7}\text{)}\)
The marked price of a laptop is ₹65,000. The laptop is sold at a discount of 20%. !fa profit of 30% is made through the sale, then what is the cost price of the laptop?
The following bar chart shows the number of computers sold by a shop in 6 consecutive months.
What is the average number of computers sold per month during this period? [Round off your answer to the nearest integer value.]
In a city 60% of the population are males and the rest are females. If the ratio of married males to non-married males is 5 : 7, and the ratio of married females to non-married females is 2: 3, then what percentage of the total population is married?
The simple interest on a sum of money invested for a period of 10 years is equal to \(\tfrac{4}{5}\) th of the sum invested. What is the rate of sinmple interest per annum that is being given?
A1 alone can complete a piece of work in 14 days, A2 alone can complete the same work in 21 days, while A3 alone can complete the same work in 28 days. The three worked together, completed the work, and received a total payment of ₹1,040 for doing the work. What is A2's share in the total payment received?
Ravi buys 5 pens at ₹ 150 each, 2 pencils at ₹ 100 each, and 3 notebooks at ₹250 each. What is the average expenditure incurred by Ravi per article?