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Home Aptitude Chain Rule Comments

  • Question
  • 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)

  • Correct Answer
  • Rs. (ydx

    Explanation
    Cost of x metres = Rs. d.

    Cost of 1 metre = Rs. d
    x

    Cost of y metres = Rs. d . y = Rs. yd ❩.
    x x

  • Chain Rule problems


    Search Results


    • 1. 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
    • 2. 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
    • 3. 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
    • 4. An industrial loom weaves 0.128 metres of cloth every second. Approximately, how many seconds will it take for the loom to weave 25 metres of cloth?

    • Options
    • A. 178
    • B. 195
    • C. 204
    • D. 488
    • Discuss
    • 5. A flagstaff 17.5 m high casts a shadow of length 40.25 m. The height of the building, which casts a shadow of length 28.75 m under similar conditions will be:

    • Options
    • A. 10 m
    • B. 12.5 m
    • C. 17.5 m
    • D. 21.25 m
    • Discuss
    • 6. 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
    • 7. 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
    • Discuss
    • 8. 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
    • 9. 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
    • 10. 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


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