Question 1111016: 1. A crew rowed 7 miles upstream in 2 hours and the 6 1/2 miles downstream in 1 hour. Find the the rate of the crew in still water and the rate of the current.
2. The sum of the reciprocals of two numbers is 7 and the difference of their reciprocals is 3. What are the numbers?
3. In a certain number of two digits, the sum of the digits increased by 3, is twice the unit digit. If the number is divided by the sum of the digits, the quotient is 4 and the remainder is 3. Find the number.
4. How many liters of each of 15% and 40% solutions of alcohol should be mixed to produced 5 liters of 20% solution?
Can i have the appropriate solution of each number.
5. A 6% investment yields in a year P13 less than a 4% investment. The sum of two investments is P1,200. What is the amount of each investment?
6. Five years ago, Dino was 1/5 as old as his father. Thirteen years from now, Dino will be half as old as his father. Find their present ages.
7. Two cars,A and B, 148 kilometers apart, traveled toward each other. A started at 6 a.m while B started an hour later. They met on the road at 9 a.m. Had both of them started at 6 a.m., they would have met at 8:28 a.m. Find the speed of each.
8. If a certain rectangular lot were 3 meters shorter and 2 meters wider, the area would be 7 square meters greater. Find the dimensions of the lot.
9. If 3 is added to the numerator of a fraction, its value becomes 4/9; while, if 2 is added to the denominator and the denominator is doubles, its value becomes 1/2. What is the fraction?
10. Danny and Rennan can do a piece of work in 6 days. How long will it take each of them to finish the work alone, if Danny can work 3/2 as fast as Renan.
Answer by ikleyn(52788)   (Show Source):
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