Class VIII

7 identical pipes fill 3 identical tanks 45mins, 5 pipes fill one of these tanks in
  1. 20min
  2. 21min
  3. 15min
  4. 10min
For y = 12 and x = 4, value of k is
  1. 3
  2. 6
  3. 4
  4. 2
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
Y is inversely proportional to x, y = 3 when x = 4, value of y when x = 6 is
  1. 2
  2. 3
  3. 6
  4. 9
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