If the simple interest on a sum of money for 2 yr at 5% per annum is Rs. 50, what is the compound interest on the same at the same rate and for the same time?
Ravi & Raghav complete a certain work in 25 days. If both started working together & Ravi left after 15 days, then Raghav do the remaining work in 20 days. How many days Raghav will take to complete the same work alone?
Ravi purchases 90 pens and sells 40 pens at a gain of 10% and 50 pens at a gain of 20%. Had he sold all of them at a uniform profit of 15% he would have got Rs. 40 less. Find the cost price of each pen?
A 3 m wide path runs outside and around a rectangular park of length 125 m and breadth 65 m. If cost of flooring is 10 rs/\( m^{2} \), find the total cost of flooring the path.