In a 90 litres mixture of milk and water, percentage of water is only 30%. The milkman gave 18 litres of this mixture to a customer and then added 18 litres of water to the remaining mixture. What is the percentage of milk in the final mixture

Joe's present age is 2/7th of his father's present age. Joe's brother is 3 years older to Joe. The respective ratio between present ages of Joe's father and Joe's father is 14:5. What is Joe's present age

A wholesaler blends two varieties of tea, one costing INR 60 per kilo and another costing INR 105/- per kilo. The respective ratio of quanitites they were mixed in was 7 : 2. If the sold the mixed variety at INR 100 per kilo, how much was his profit percentage

A took a certain sum as loan from bank at a rate of 8% simple interest per annum. A lends the same amount to B at 12% simple interest per annum. If at the end of five years, A made profit of INR 800/- from the deal, how much was the original sum

A project manager hired 16 men to complete a project in 38 days. However, after 30 days, he realized that only 5/9th of the work is complete. How many more men does he need to hire complete the project on time

14 6 5 6.5 12 ?