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Home Aptitude Chain Rule Comments

  • Question
  • If a quarter kg of potato costs 60 paise, how many paise will 200 gm cost?


  • Options
  • A. 48 paise
  • B. 54 paise
  • C. 56 paise
  • D. 72 paise

  • Correct Answer
  • 48 paise 

    Explanation
    Let the required weight be x kg.

    Less weight, Less cost (Direct Proportion)

    ∴ 250 : 200 :: 60 : x   ⟺    250 x x = (200 x 60)

    x= (200 x 60)
    250

    x = 48.


  • Chain Rule problems


    Search Results


    • 1. 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?

    • Options
    • A. 648
    • B. 1800
    • C. 2700
    • D. 10800
    • Discuss
    • 2. 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?

    • Options
    • A. Rs. (xyd)
    • B. Rs. (xd)
    • C. Rs. (yd)
    • D. Rs. (ydx)
    • Discuss
    • 3. A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions, then the number of revolutions mad by the larger wheel is:

    • Options
    • A. 4
    • B. 9
    • C. 12
    • D. 49
    • Discuss
    • 4. 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?

    • Options
    • A. 20
    • B. 30
    • C. 40
    • D. 50
    • Discuss
    • 5. If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days?

    • Options
    • A. 1
    • B. 72
    • C. 7
    • D. 49
    • Discuss
    • 6. A fort had provision of food for 150 men for 45 days. After 10 days, 25 men left the fort. The number of days for which the remaining food will last, is:

    • Options
    • A. 29 15
    • B. 37 14
    • C. 42
    • D. 54
    • Discuss
    • 7. A man completes 5⁄8 of a job in 10 days. At this rate, how many more days will it takes him to finish the job?

    • Options
    • A. 5
    • B. 6
    • C. 7
    • D. 7 12
    • Discuss
    • 8. 39 persons can repair a road in 12 days, working 5 hours a day. In how many days will 30 persons, working 6 hours a day, complete the work?

    • Options
    • A. 10
    • B. 13
    • C. 14
    • D. 15
    • Discuss
    • 9. A man can row three-quarters of a kilometre against the stream in 11¼ minutes and down the stream in 7½ minutes. The speed (in km/hr) of the man in still water is:

    • Options
    • A. 2
    • B. 3
    • C. 4
    • D. 5
    • Discuss
    • 10. A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is:

    • Options
    • A. 8.5 km/hr
    • B. 9 km/hr
    • C. 10 km/hr
    • D. 12.5 km/hr
    • Discuss


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