MEAP Preparation - Grade 7 Mathematics 2.16 Direct Variation or Direct Proportion

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

Q 1: 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? $3,750 $3,500 $2,750

Q 2: A motor bike travels 225 km with 5 liters of gas. How many liters of gas are needed to travel 135 km? 4 liters 3.5 liters 3 liters

Q 3: The numbers r and s vary directly and the constant of variation is 3/5. Find r if s=45; and find s if r =33. 50 and 25 respectively 27 and 55 respectively 55 and 27 respectively

Q 4: 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. 14 and 24 respectively 24 and 14 respectively 25 and 15 respectively

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. 15 and 29 respectively 26 and 19 respectively 19 and 26 respectively

Q 6: 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? 15 grams 20 grams 13 grams

Q 7: One evening the length of the shadow of a building's pillar of height 28 m is 42 m. What will be the length of the shadow of the building's tower of height 36 m at that time? 54 m 50 m 45 m

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? 130 dollars 140 dollars 138 dollars

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!