Class VII

P is inversely proportional to Q, P = 9 when Q = 2, value of P when Q = 3 is
  1. 7
  2. 4
  3. 6
  4. 8
If 30 : 50 = 6 : x then value of x is
  1. 20
  2. 30
  3. 10
  4. 50
7 identical pipes fill 3 identical tanks 45mins, 5 pipes fill one of these tanks in
  1. 20min
  2. 21min
  3. 15min
  4. 10min
Q is directly proportional to √p Q = 21 when p = 9, value of Q when p = 81 is
  1. 63
  2. 64
  3. 56
  4. 67
Y is inversely proportional to √x y = 6 when x = 4, value of x when y = 4 is
  1. 12
  2. 7
  3. 9
  4. 8
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