Direct and inverse proportion

If x and y are directly proportional and when x = 13, y = 39, which of the following is not a possible pair of corresponding values of x and y ?

• 1 and 3

• 17 and 51

• 30 and 10

• 6 and 18

Tags

CCSS.7.RP.A.2A

Which of the following is in direct proportion?

• One side of a cuboid and its volume.

• Speed of a vehicle and the distance travelled in a fixed time interval.

• Change in weight and height among individuals.

• Number of pipes to fill a tank and the time required to fill the same tank.

Amrita takes 18 hours to travel 720 kilometres. Time taken by her to travel 360 kilometres is (a)   hours.

Tags

CCSS.HSF-LE.A.1B

If x and y are inversely proportional then (a)   = k where k is positive constant.

10 metres of cloth cost Rs 1000. What will 4 metres cost ?

• Rs 400

• Rs 800

• Rs 200

• Rs 100

Tags

CCSS.6.EE.B.7

If 18 women can reap a field in 7 days, in what time can 6 women reap the same field ?

• 15 days

• 21 days

• 30 days

• 36 days.

Tags

CCSS.HSA.CED.A.1

A machine in a soft drink factory fills 600 bottles in 5 hours. How many bottles will it fill in 2 hours ?

• 120

• 180

• 150

• 240

Tags

CCSS.6.RP.A.3B

40 cows can graze a field in 16 days. How many cows will graze the same field in 10 days ?

• 60

• 64

• 80

• 75

Tags

CCSS.6.RP.A.3B

If x = ky and when y = 4, x = 8 then k =

• 1

• 2

• 3

• 4

x and y vary inversely with each other. If x = 15 when y = 6, then the value of x when y = 15 is

• 2

• 4

• 5

• 6