Class IX

3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?
  1. 9
  2. 10
  3. 11
  4. 12
In a camp, there is a meal for 120 men or 200 children. If 150 children have taken the meal, how many men will be catered to with remaining meal?
  1. . 20
  2. 30
  3. 40
  4. 50
36 men can complete a piece of work in 18 days. In how many days will 27 men complete the same work?
  1. 12
  2. . 18
  3. 22
  4. 24
If the cost of x metres of wire is d rupees, then what is the cost of y metres of wire at the same rate?
  1. Rs. xy d
  2. Rs. (xd)
  3. Rs. (yd)
  4. Rs. yd x
Running at the same constant rate, 6 identical machines can produce a total of 270 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes?
  1. 648
  2. 1800
  3. 2700
  4. 10800
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