For the following questions answer them individually
D can do work in 18 days and E can do the same work in half that time. How many days will they take to finish the work, doing it together?
15 laptops were purchased at Rs. 15,000 each and all of them were sold for Rs. 2.97 Lakh. Find the profit percentage.
An amount is deposited at 8% p.a. compound interest. If the first year interest is Rs.72, find the interest amount for the $$2^{nd}$$ year.
N has Rs. p more than K. The total amount available with N and K together is Rs. q. How much does K have?