Math Word Problems - GED, PSAT, SAT, ACT, GRE Preparation 7.10 Inverse Variation or Inverse Proportion

Inverse Variation or Indirect Variation Directions: Answer the following questions. Also write at least ten examples of your own.

Q 1: A farmer has enough grain to feed 50 cattle for 10 days. He sells 10 cattle. For how many days will the grain last now? 50 days 55 days 40 days

Q 2: At the rate of 28 lines per page, a book has 300 pages. If the book has to contain only 280 pages, how many lines should a page contain? 32 lines 30 lines 29 lines

Q 3: 35 carts are needed to transport the entire grain in a warehouse at the rate of 8 bags a truck. But the truck drivers objected saying it was too heavy and carried only 7 bags a truck. How many more trucks are needed to transport the grain? 9 5 4

Q 4: In an army camp, there is food for 8 weeks for 1200 people. After 3 weeks, 300 more soldiers joined the camp. For how many more weeks will the food last? another 4 weeks another 3 weeks another 5 weeks

Q 5: The number 'r' varies inversely as 's' and the constant of variation is 20. Find s when r=5; and find r when s=-2. 5 and -10 respectively 4 and -10 respectively -10 and 4 respectively -10 and 5 respectively

Q 6: It is known that current (A) in an electric circuit is inversely proportional to the resistance (R) in the circuit. When the resistance is 3 ohms, the current is 2 amperes. Find the resistance if the current is 5 amperes; and find the current when the r 2 ohms and 1 amperes respectively 1 ohms and 1 amperes respectively 1.2 ohms and 1.2 amperes respectively

Q 7: If y varies inversely as x; and x=6 when y=-3, find y when x=-9. 2 3 6

Q 8: Some people working at the rate of 6 hours a day can complete the work in 19 1/2 days. As they have received another contract, they want to finish this work early. Now they start working 6 1/2 hours a day. In how many days will they finish this work? 16 days 20 days 18 days

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!