Direct Variation or Direct Proportion - Math Word Problems - GED, PSAT, SAT, ACT, GRE Preparation - kwizNET Math/Science/English Homeschool/Afterschool/Tutoring Lessons/Worksheets/Quizzes/Trivia

Math Word Problems - GED, PSAT, SAT, ACT, GRE Preparation 7.9 Direct Variation or Direct Proportion

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

Q 1: A motor bike travels 225 km with 5 liters of gas. How many liters of gas are needed to travel 135 km? 4 liters 3 liters 3.5 liters

Q 2: The pressure P exerted at any point on the base of a tank filled with liquid varies directly as the depth D of the liquid. The pressure exerted by the liquid 25 cms deep on the base of the tank is 10 g/sq. cm. What will be the pressure when the depth is 16 g/sq. cm 20 g/sq. cm 18 g/sq. cm

Q 3: The weight E of a man on earth's surface is directly proportional to his weight M on mars. The constant of proportionality is 3, if a man weights 126 kg on earth, how much will he weigh on mars? 40 kgs 45 kgs 42 kgs

Q 4: The amount of heat (H) produced in human body by burning of proteins is directly proportional to the amount of proteins (A) burnt. If burning of 1 gram of proteins produces 32 calories of heat, how much proteins should be burnt to produce 52 calories? 20 grams 13 grams 15 grams

Q 5: The numbers p and q are directly proportional and p=7.5 when q=15. Find p when q=38; and find q when p=13. 19 and 26 respectively 15 and 29 respectively 26 and 19 respectively

Q 6: The numbers x and y are directly proportional and x=9 when y=3. Find x when y=8; and find y when x=42. 25 and 15 respectively 14 and 24 respectively 24 and 14 respectively

Q 7: The expenditure per month for 15 students in a dormitory is $2,250. If 10 more students joined, what will be the monthly expenditure now? $2,750 $3,750 $3,500

Q 8: A family spends 120 dollars per month for vegetables when the cost of vegetables is 5 dollars per kg. How much amount must the family spend per month, if the cost of vegetables goes up to 5.75 dollars per kg? 140 dollars 130 dollars 138 dollars

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!