Ketan and Kunal can complete a job together in 7 days. Kunal is \( \frac{7}{4} \) times as efficient as Ketan. In how many days can Kunal alone complete the job?
A sum of money, invested at a certain rate of simple interest per annum, amounts to ₹720 in 4 years and to ₹800 in 5 years. The sum invested is:
The following graph shows the percentage rise in the profits of two companies over the years.
What is the average of the percentage increases in the year-to-year profit of Company M over all the given years, taken together? [Give your answer correct to the nearest integer value.]
Find the amount payable on maturity if ₹20,00,000 is invested at 12% per annum for \( \frac{3}{2} \) years and interest is compounded half-yearly.
The following pie chart shows the share of the marks scored by Rahul in an examination in each of 5 different subjects - English, Hindi, Mathematics, Science and Social Science - as percentages of the total marks scored by Rahul in all the 5 subjects taken together.
What is the central angle showing the shares of the marks in Hindi and Social Science, taken together?