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  • Question
  • The tank-full of petrol in Arun's motor-cycle lasts for 10 days. If he starts using 25% more everyday, how many days will the tank-full of petrol last?


  • Options
  • A. 5
  • B. 6
  • C. 7
  • D. 8

  • Correct Answer


  • Explanation

    Let us assume that Arun uses N units of petrol everyday. so the amount of of petrol in the tank when it is full will be 10N. If he starts using 25% more petrol everyday. then the units of petrol he now use everyday will be
    N(1 + 25/100) = 1.25N

    So, the number of days his petrol will now last will be equal to (amount of petrol in tank) / (number of units used everyday)
    = (10N) / (1.25N) = 10 / 1.25
    = 8 days


  • Percentage problems


    Search Results


    • 1. 
      In 1998, ratio of the numbers of students taking examinations in x and z states are respectively 3 : 5 : 6. Next year, the numbers of students are increased by 20%, 10% and 20% respectively. If ratio of the numbers of students in states x and z is 1 : 2, then find the number of students who sit to take examination in 1998.?

    • Options
    • A. 5000
    • B. 6000
    • C. 75000
    • D. Data is insuffcient
    • Discuss
    • 2. 
      The expenses on wheat, meat and vegetable of a family are in the ratio 12 : 17 : 3. The prices of these articles are increased by 20%, 30% and 50% respectively, The total expenses of the family on these articles are increased by?

    • Options
    • A. 231/3%
    • B. 281/8%
    • C. 271/8%
    • D. 251/7%
    • Discuss
    • 3. 
      The price of ghee is increased by 32%. Therefore, a family reduces its consumption, so that the increment in price of ghee is only 10%. If consumption of ghee is 10 kg before the increment, then What is the consumption now?

    • Options
    • A. 81/3 kg
    • B. 83/4 kg
    • C. 81/2 kg
    • D. 9 kg
    • Discuss
    • 4. 
      The ratio of the number of boys and girls in a school is 3 : 2. If 20% of the boys and 25% of the girls are scholarship holders, then the percentage of the students who do not get the scholarship, is?

    • Options
    • A. 78%
    • B. 75 %
    • C. 60%
    • D. 55%
    • Discuss
    • 5. 
      Ram sells his goods 25% cheaper then Shyam and 25% dearer than Hari. How much percentage is Hari's goods cheaper than Shyam?

    • Options
    • A. 25
    • B. 331/3
    • C. 40
    • D. 50
    • Discuss
    • 6. 
      In a examination out of 480 students, 85% of the girls and 70% of the boys passed. How many boys appeared in the examination, if total pass percentage was 75%?

    • Options
    • A. 370
    • B. 340
    • C. 320
    • D. 360
    • Discuss
    • 7. 
      Find the cube root of 19683.

    • Options
    • A. 25
    • B. 26
    • C. 28
    • D. 27
    • Discuss
    • 8. 
      If ? y/169 = 54/39, then y is equal to?

    • Options
    • A. 108
    • B. 324
    • C. 2916
    • D. 4800
    • Discuss
    • 9. 
      112/?196 x ?579/12 x ?256/8 =?

    • Options
    • A. 8
    • B. 12
    • C. 16
    • D. 32
    • Discuss
    • 10. 
      Given that ? 4096 = 64, the value of ? 4096 + ? 40.96 + ? .004096 is?

    • Options
    • A. 70.4
    • B. 70.464
    • C. 71.104
    • D. 71.4
    • Discuss


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