Class VIII

Y is directly proportional to x2, x = 2 and y = 20, value of x when y = 1.25 is
  1. 0.3
  2. 0.6
  3. 0.5
  4. 0.8
Y and x are directly related, y = 5 when x = 2, then value of y when x = 7 is
  1. 12.3
  2. 17.5
  3. 18
  4. 17.9
For y = 21 and k = 3, value of x is
  1. 21
  2. 22
  3. 1
  4. 5
If mass of 108 books is 30kg then mass of 150 books is
  1. 27.33
  2. 23.40
  3. 45.67
  4. 26.80
For y = 12 and x = 4, value of k is
  1. 3
  2. 6
  3. 4
  4. 2
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