For the following questions answer them individually
A sum of ₹10,000 was taken from a bank at the rate of 6% per annum to be compounded half yearly. How much has to be returned after one and half years?
Kuldeep is twice as efficient as Manish to do a work. Working together they can finish a piece of work in 36 days. Kuldeep alone can finish the work in:
Two buckets are filled with milk and water in the ratio of 4 : 1 and 7 : 2. If these mixtures are mixed in the ratio of 1 : 5 respectively, then the resulting mixture will have water and milk in the ratio of:
Johns monthly expenditure is 85% of his monthly salary and Jack's monthly expenditure is 90% of his monthly salary. Their combined expenditure is 88%. If John's monthly salary is ₹60000, then what is the monthly salary of Jack?
If the diameter of the base and the height of a cylinder are 16cm and 20 cm respectively, then what is the total surface area of the cylinder? (Use $$\pi = \frac{22}{7}$$)
A principal becomes ₹1,458 at the rate of 8% per annum on compound interest in 2 years and interest is compounding annually. What is the principal?
Revanth sold 8 shirts for a total profit of Rs.480 and 12 shirts for a total profit of Rs.160. At what profit per shirt should he sell the remaining 20 shirts so that he gets an average profit of Rs.20 per shirt?
Ram covers 500 km distance in 20 hours in traffic; he covered some distance by bike at 30 km/h, and rest by car at 20 km/h. The distance covered by bike (in km) is:
A can do as much work as B and C together can do. A and B can together do a piece of work in 7 hours 12 minutes and C can do it in 36 hours. Find the time (in hours) that B needs to do the work alone.
If the radius of a sphere is 70 feet, then find its surface area. (Use $$\pi = \frac{22}{7}$$)