x and y are in direct proportion, Match the column
class8-maths-chapter-13-mcq-1.png
  • p -> ii, q -> iii , r -> i
  • p -> i, q -> ii , r -> iii
  • p -> iii, q -> ii , r -> i
  • p -> iii, q -> i , r -> ii
x and y are in inverse proportion, Match the column
class8-maths-chapter-13-mcq-2.png
  • p -> ii, q -> iii , r -> i
  • p -> i, q -> ii , r -> iii
  • p -> iii, q -> ii , r -> i
  • p -> iii, q -> i , r -> ii
which of the following statement is correct?
  • If x and y are in direct proportion, then (x – 1) and (y – 1) are also in direct proportion.
  • If two quantities x and y vary directly with each other, then x/y is constant
  • If two quantities p and q vary inversely with each other, then x/y is constant
  • If d varies directly as $t^2$ , then we can write $dt^2 = k$, where k is some constant.
In a hostel of 50 boys, there are food provision for 40 days, if  30 more boys join the hostel, the food provision will last for ?
  • 25 days
  • 30 days
  • 20 days
  • 15 days
A pipe can fill a tank in 20 hrs . Due to a leak in the bottom of the tank, it is filled in 25 hrs . if the tank is full how much time will the  leak take to empty it.
  • 60 hours
  • 80 hours
  • 100 hours
  • 75 hours
30 persons can reap a field in 17 days. How many more persons should be engaged to reap the same field in 10 days?
  • 21
  • 20
  • 25
  • 15
If the wages of 15 workers for 6 days are RsThe wages of 19 workers for 5 days is
  • Rs 9800
  • Rs 9975
  • Rs 9745
  • Rs 9560
Both x and y vary directly with each other and when x is 10, y is 14, which of the following is not a possible pair of corresponding values of x and y?
  • 25 and 35
  • 21 and 15
  • 35 and 49
  • 55 and 77
A ,B and C together complete a piece of work in 4 days. A alone completes it in 12 days and B alone in 15 days. C alone will finish the work in?
  • 16 days
  • 15 days
  • 12 days
  • 10 days
Which of the following quantities does not vary directly with each other?
  • Simple interest on a given sum and the rate of interest.
  • Side of the square and its perimeter
  • The distance travelled by CNG bus and the amount of CNG used.
  • Compound interest on a given sum and the sum invested.
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